Category Archives: collections

June 12, 2022 · 9:06 pm

Rhinos too thick: Fossils and flattery at Agate Springs

“No progress at all. Rhinos too thick.”

So wrote American Museum of Natural History fossil collector Albert Thomson in his September 1917 field notes. At that point, Thomson been collecting mammal fossils at Agate Springs nearly every year since 1907—and was still finding rhino bones in such abundance that they formed a seemingly impenetrable layer.

Located in northwest Nebraska and dating to about 22 million years ago, the Agate Springs bone bed is an aggregation of fossilized animals on an astonishing scale. Like the Carnegie quarry at Dinosaur National Monument, it provides a snapshot of an ecosystem at a moment in geologic time. But while a high estimate of the individual dinosaurs represented at Carnegie Quarry is in the hundreds, the main bone bed at Agate Springs may well contain tens of thousands of animals. The vast majority of fossils come from the tapir-sized rhino Menoceras, scrambled and packed together in a layer up to two feet thick. Moropus, Daeodon, and an assortment of other hoofed animals and small carnivores have also been found. These animals may have gathered during a drought and succumbed to thirst or disease, before the returning rains rapidly buried their remains. It’s also possible that the bone bed represents a mass drowning during a flash food. Since different parts of the site vary in density, Agate Springs likely represents multiple mortality events over a number of years.

Tableau of cast fossil skeletons at the Agate Fossil Beds National Monument visitor center. Photo by the author.

Today, less than 30% of the Agate Springs bone bed has been excavated, but not for a lack of effort. Teams from a half dozen museums visited the site between 1900 and 1925, with the Carnegie Museum of Natural History (CM), the University of Nebraska State Museum (UNSM), and the American Museum of Natural History (AMNH) establishing large-scale excavations and returning year after year. As we shall see, the relationships between these teams were not always amicable, making this period at Agate Springs a window into the preoccupations of museum workers at the turn of the century. Agate Springs also illustrates how east coast paleontologists interacted with and relied on local people, defending their social capital as jealously as any fossil deposit. Finally, museums’ interest in Agate Springs in the mid 20th century exemplifies how exhibitions had evolved during the intervening period.

The setting

Agate Springs is unceded Sioux territory, occupied by settlers after the Kansas-Nebraska Act of 1854. James Cook purchased the treeless tract of rolling hills from his father-in-law in 1887, naming it Agate Springs after the rocky banks of the nearby Niobrara River. James and Kate Cook established a ranch where they raised horses and cattle, and Agate Springs became a popular stop for travelers on their way to Cheyenne, Wyoming.

The Cooks were aware of bones weathering out of the hills as far back as 1885, when the land was still owned by Kate’s father. James knew that scientists were on the lookout for fossils in the region—by one account he worked for O.C. Marsh as a translator in 1874. Once the ranch was established, he began writing to museums, including UNSM in Lincoln and the Carnegie Museum in Pittsburgh, inviting them to visit Agate Springs. A UNSM party led by Erwin Barbour was the first to drop by, spending a night at the Cook homestead in July 1892. Chiefly concerned with collecting “devil’s corkscrews” (ancient beaver burrows) north of the Niobrara, Barbour sent his student F.C. Kenyon to check out the bones Cook promised in the nearby hills. Kenyon collected as much as he could carry, but his report apparently did not excite Barbour, and the UNSM party moved on.

It would be twelve years before another paleontologist visited Agate Springs. Olaf Peterson of the Carnegie Museum stopped by the ranch in early August of 1904, at the end of a tumultuous field season in western Nebraska. Peterson had received a telegram on July 4 that his brother-in-law, boss, and mentor John Bell Hatcher had died of typhoid. Peterson intended to cut the season short, but Carnegie Museum director William Holland denied the request, writing in no uncertain terms that Peterson was to continue his work in Nebraska. Later in July, Peterson fell ill himself, and spent several days recovering in Fort Robinson. Suffice it to say, Peterson was not in the best of moods when he arrived at Agate Springs.

Nevertheless, the outcrops Peterson saw at Agate Springs revitalized his spirit. Accounts differ on what part of the site Cook showed him (this will be important shortly), but when he returned east two weeks later he was raving about a quarry with “ten skulls within a six-foot radius.” In Pittsburgh, Peterson and Holland began drawing up plans for an ambitious excavation the following year. In their view, they had staked a claim to the site: just like contemporary gold and oil prospectors, turn-of-the-century paleontologists lived by the rule of “dibs.” For the museum crowd, being the first scientist to “discover” a quarry meant an entitlement to control the site and the resources it produced. This included both the physical fossils and the privilege to describe and interpret those fossils—controlling the site meant controlling scientific knowledge.

Dueling quarries

Cook either didn’t know about such customs, or didn’t care. To his credit, Cook was never interested in monetizing the fossils at Agate Springs. By all accounts, he simply wanted to share with the world the knowledge that the bone bed represented. He was concerned that it was so expansive that no single team could uncover all its secrets. On May 26, 1905, Cook wrote to Barbour, inviting him to share in the bounty he had shown Peterson the previous summer, explaining that it was “so large that [the Carnegie team] could not work it out in years, so there is plenty of material for other parties to work with.”

On other occasions, Barbour had taken a cautious stance when corresponding with landowners. In this case, however, he could barely contain the enthusiasm in his reply. In a single letter, Barbour reminded Cook that UNSM had visited 12 years before and therefore should have collecting rights, asked Cook to place a literal flag on the site claiming it for the University of Nebraska, offered to hire Cook’s 18 year-old son Harold as a field assistant, and appealed to Cook’s state pride by listing the out-of-state institutions that were removing Nebraska’s fossil heritage each year.

Carnegie Hill and University Hill today. Photo by the author.

That summer, Peterson and Barbour opened quarries on two neighboring buttes at Agate Springs, which came to be known as Carnegie Hill and University Hill. While the two parties were cordial neighbors, letters exchanged by Holland, Barbour, and Cook demonstrate that the museum directors were uncomfortable with the situation. Holland repeatedly wrote to Cook, claiming that his team was more skilled than Barbour’s and warning that it would be bad for science if the fossils and geological data were split between two institutions. Harold Cook didn’t appreciate Holland’s condescending tone. In a note to his father pinned to one of the letters, he wrote that “a letter of this kind is the work of a pinheaded, egotistical, educated fool.”

The Carnegie and UNSM teams returned to Agate Springs in 1906, but spent the summer of 1907 elsewhere. The elder Cook took the opportunity to invite yet more paleontologists, and teams from AMNH, the Yale Peabody Museum, and Amherst College showed up to collect fossils.

Meanwhile, Holland began a campaign to wrest control of the site by any means necessary. He became particularly focused on the narrative of who discovered the bone bed. According to Holland, Cook had shown Peterson the smaller, less dense site that would be come to be known as Quarry A. Peterson then went prospecting on his own and found the primary bone bed that straddled the two buttes. Holland went on to argue that regardless of who first saw the fossils, Peterson earned credit for the discovery because he was the first trained scientist on the scene, and therefore the first individual to correctly identify the age and identity of the animal remains.

Cook rejected Holland’s retelling of the events of August 1904, insisting that he had known of the bone bed for years before he showed it to Peterson. In many ways, the two men were talking past each other. Cook found Holland’s insistence on claiming the discovery for Peterson nonsensical and disrespectful—he knew his own land, and he was the one who invited the paleontologists in the first place. Holland, on the other hand, was staking a claim among his fellow academics. He needed to demonstrate that the Carnegie Museum had been at Agate Springs first, so that other institutions would yield to his authority to interpret and publish on the fossils.

Harold Cook’s homestead cabin, recently fixed up and painted. Photo by the author.

Late in 1907, Holland visited the Cooks’ ranch in person for the first time. He offered to buy the fossil-bearing land outright, doubtlessly planning to block the other museums from accessing it. At this point, James Cook made the awkward discovery that Carnegie Hill and University Hill were actually just outside his official holdings, in the public domain. Holland moved to purchase the land, but Harold Cook beat him to it, building a cabin and filing a homestead claim in March 1908. In their gentlemanly rancher way, the Cooks told Holland to get lost, and the Carnegie Museum left Agate Springs for good.

Playing nice

While Holland had managed to sour his relationship with a remarkably welcoming and accommodating landowner, Barbour did the opposite. In letters to Cook, he regularly acknowledged the rancher as the discoverer of the site. He visited the Cooks frequently and employed Harold in the UNSM quarry, training the younger Cook into a formidable fossil prospector and anatomist. Soon Harold was studying at the University of Nebraska under Barbour, and a few years later, Harold and Barbour’s daughter Elinor were married. Barbour also named a few species after the Cooks, including Moropus cooki.

AMNH director Henry Osborn and field manager Albert Thomson had a similarly positive relationship with the Cooks. The New York museum took over Carnegie Quarry in 1908, and Osborn visited several times to express his gratitude. Like Barbour, he paid Harold for his time, labor, and expertise. Later, Osborn invited Harold to work at AMNH during the off-season. In return, AMNH was permitted to collect at Agate Springs for nearly two decades. Thomson returned almost every year through 1923, and the museum accumulated so many Menoceras and Moropus fossils that it began selling and trading them to other institutions.

Menoceras and Moropus slab at the National Museum of Natural History. Photo by the author.

The reward for staying in the Cooks’ good graces was clear. UNSM and AMNH paleontologists gained access to the Agate Spring quarries for many years, accumulating large collections. They earned accolades from publications, public interest from the skeletons they placed on exhibit, and even monetary rewards from selling the excess specimens. Meanwhile, the Carnegie Museum was shut out after their first few seasons of collecting because Holland was, if not outright hostile to the Cooks, unable to communicate effectively with the ranchers. For American paleontologists at the turn of the century, social capital was a critical resource. Positive relationships with landowners and other individuals in the fossil-rich western states earned them access to land, information about the terrain, and networks of eyes on the ground, any of which might lead them to the next important quarry.

You get a rhino block, and you get a rhino block…

The scale and intensity of the Agate Springs excavations decreased after 1910, and in the early 20s, Thompson and the AMNH crew closed up shop, believing they had found examples of every species that could be found. By that time, the site’s value for museums had shifted. Rather than being a bonanza of specimens to collect, categorize, and publish on, Agate Springs had become a place to quickly and easily obtain display-worthy fossils. As Hunt puts it, the site was a “storehouse of good exhibit materials, to be tapped when needed by museums wishing to mount a rhino or two.”

Today, Agate Springs fossils—acquired in the field or via trade—are on display at large and small museums all over North America. Many of these are mounted skeletons of rhinos, camels, and Moropus, but there is also a particular abundance of large, incompletely prepared slabs, which provide viewers with a small window into the Agate Springs bone bed. Because of the sheer density of bones, the early 20th century excavation teams quickly stopped jacketing fossils individually, and instead began preparing out large blocks, typically four to six feet across. The blocks were hardened with shellac, and reinforced with wood planks around their borders. Pulleys and cranes were required to lift the largest blocks out of the quarries. In the early years, the intention was to fully excavate these blocks at their respective museums. It’s not clear which museum first placed a complete block on exhibit, but the idea proved popular. Many later visitors to Agate Springs, from James Gidley of the National Museum of Natural History in 1909 to Elmer Riggs of the Field Museum of Natural History in 1940, came with the express purpose of collecting intact slabs for display.

Menoceras slab on display at the Field Museum of Natural History. Photo by the author.

The popularity of fossil blocks from Agate Springs coincides with a shift in philosophy toward exhibitions at natural history museums. While early 20th century exhibits were catalogs of life, emphasizing the breadth of the museum’s collection, by the 1920s and 30s many museums had begun moving toward narrative exhibits. Displays were intended to communicate ideas, and objects served as illustrations of those ideas. The fossil blocks from Agate Springs were ready-made illustrations of a number of paleontology concepts, from the process of taphonomy to the task of excavation millions of years later. Most have remained on display to this day, a fact that James Cook would undoubtably be pleased with.

An incomplete list of museums in possession of Agate Springs blocks follows. Do you know of others? Please leave a comment!

Carnegie Museum of Natural History
American Museum of Natural History
University of Nebraska State Museum
Field Museum of Natural History
National Museum of Natural History
Royal Ontario Museum
Denver Museum of Nature and Science
Yale Peabody Museum of Natural History
Harvard Museum of Comparative Zoology
University of Wyoming Geological Museum
South Dakota School of Mines and Technology
Wesleyan University Geology Museum
University of Austin Texas Memorial Museum
University of Michigan Museum of Natural History
Science Museum of Minnesota
Fort Robinson State Park Trailside Museum

References

Agate Fossil Beds: Official National Park Handbook. Washington, DC: National Park Service.

Hunt, R.M. 1984. The Agate Hills: History of Paleontological Excavations, 1904-1925.

Vetter, J. 2008. Cowboys, Scientists, and Fossils: The Field Site and Local Collaboration in the American West. Isis 99:2:273-303.

Skinner, M.F., Skinner, S.M., Gooris, R.J. 1977. Stratigraphy and Biostratigraphy of Late Cenozoic Deposits in Central Sioux County, Western Nebraska. Bulletin of the American Museum of Natural History 158:5:265-370.

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Filed under AMNH, CMNH, collections, dinosaurs, DMNS, exhibits, field work, fossil mounts, history of science, museums, NMNH, ornithopods, sauropods, theropods, thyreophorans

Tagged as amnh, CMNH, dinosaur national monument, dinosaurs, fossil mounts, fossils, history of science, museums, NMNH, paleontology, ROM

March 1, 2018 · 9:34 pm

Paleontology Exhibits of California – Part 2

After visiting the La Brea Tar Pits and the Natural History Museum of Los Angeles County, we headed to Claremont to check out the Raymond M. Alf Museum of Paleontology. I had heard lots of good things about the Alf Museum and have been wanting to check it out for some time. Many, many thanks to Curator Andy Farke (as well as Lucy Herrero and Gabriel Santos) for generously taking the time to show us around!

The Alf Museum is housed in a distinctive circular building, with a peccary mosaic over the door.

The Alf Museum is extremely unique. Located at the Webb School in Claremont, it is the only nationally accredited museum on a high school campus. The museum grew out of the collection of Webb teacher Raymond Alf. Though he was not a paleontologist by training, Alf became hooked on fossils after finding a Miocene peccary skull on a 1936 trip to the Mojave Desert. Alf continued to take students fossil hunting year after year, building a sizable collection in the basement of the library and any other storage space he could find. In 1968, alumi and school administrators came together to establish the non-profit Alf Museum, with Raymond Alf himself serving as its first director. Alf passed away in 1999, but lived long enough to see his museum become an internationally recognized research institution.

Webb School students continue to take an active part in collecting and research at the museum. All students go through a paleontology course in 9th grade, and about a fifth of the student body remains involved afterward. 95% of the museum’s 140,000 fossils were found by students on “peccary trips” to California, Utah, and Arizona. Students also lead tours and work in the state-of-the-art fossil prep and digitization labs. To date, 28 students have co-authored technical papers before graduating, all of which are proudly displayed at the museum.

Alf and a group of students collected this Permian reptile trackway in 1967 near Seligman, Arizona.

In the Hall of Footprints, mounted skeletons are cleverly placed over real fossil trackways.

There are two exhibits at the Alf Museum, each taking up one of the two floors. The lower level houses the Hall of Footprints, which was last renovated in 2002. This exhibit showcases one of the largest fossil trackway collections in the United States. Trace fossils on display range from Permian reptiles and insects to Cenozoic elephants and camels, as well as important holotypes like the world’s only known amphicyonid (bear-dog) trackway. To quote Dr. Farke, much of the footprint collection was acquired by “being stupid.” Despite being miles from any road, Alf and his students would cut colossal track-bearing slabs out of the bedrock by hand. Between the logistical problems and the availability of digitization techniques like photogrammetry, few modern ichnologists would condone Alf’s practices. On the other hand, his recklessness ensured that these fossils are available for study today, even after many of the source localities have weathered away or been vandalized.

The main level’s Hall of Life is a more traditional walk through time, but with an Alf Museum spin. Visitors follow the circumference of the annular building, starting with the origin of the universe and progressing chronologically through the major milestones in the evolution of life on Earth. The bigger, showier aspects of the exhibit are not unique to the museum. There’s a cast of the Red Deer River Centrosaurus from the American Museum of Natural History, and a composite cast of a Cleveland-Lloyd Allosaurus. A model of the famous transitional fish Tiktaalik has an identical twin at the Field Museum. Like many modern exhibits, walls are filled in with large murals and a varied color palate is used to demarcate themed sections. Different audio tracks throughout the exhibit are subtlety employed in the same way (the sound of buzzing prairie insects symbolizing the rise of grasslands in the Cenozoic is particularly inspired).

Showy dinosaur casts undoubtedly draw visitors’ attention.

Original and cast specimens from the Paleozoic are illustrated by one of several murals by Karen Carr.

Once one looks past the more ostentatious parts of the display, the Alf Museum really gets interesting. Since Dr. Farke was involved in the Hall of Life’s 2011 renovation, he could explain the design choices in detail. Some of these follow Farke’s own sensibilities. For instance, the scientific method and the evidence for evolution are strongly emphasized. Most labels are implicitly written to answer the question how do we know? Interactives tend to be of the analog variety, and multimedia is only used to illustrate things that could not be effectively shown with a static display. One example is a video where a computer model of a pterosaur skeleton demonstrates the quadrupedal launch hypothesis.

Expressive Dinictis and Hyaenodon mounts welcome visitors to the Cenozoic.

“What are you going to do with your moment in time?”

Nevertheless, in both large and small ways the main themes of the exhibit are modeled after Raymond Alf’s own teaching philosophies. Following Alf’s lead in trusting students to treat specimens mindfully and respectfully, many objects are not in cases and within arm’s reach. The circular halls harmonize with the “spiral of time,” Alf’s preferred metaphor for the geological record (and circles and spirals are a recurring visual motif throughout the museum). Perhaps most importantly, the Hall of Life’s walk through time doesn’t end in the past but in the present. This final section includes nods to the archaeological record, as well as cases featuring new research and discoveries by Webb School students. The message is that despite our short time on Earth, humans have had a profound impact on the planet and every individual has a part to play in the larger story of the universe. As Alf repeatedly asked his students, “what are you going to do with your moment in time?”

Student stories and quotes can be found throughout the exhibits.

The most thought-provoking thing that Farke told me was that the Alf Museum is intended for three distinct audiences. There are the regular museum visitors, seeking a generalized look at paleontology. Then there are current Webb School students, who make use of the museum as part of their classes. Finally, there is the larger cohort of Webb alumni, who want to see specimens they remember from decades past (including fossils they collected themselves) and to reflect on their time at the school and on Raymond Alf himself. It is the nods to this third group that make the Alf Museum’s exhibits uncommonly special. Even as an outsider who had never met a Webb student and was just learning about Alf’s legacy, I found that the museum has a palpable sense of community.

Between the photos of beaming students on peccary trips to the unattributed Raymond Alf quotes printed high on the walls, the shared experiences of the Webb School community are intractably situated within the exhibits. Objects on display are illustrative specimens, but they are also more. Each one represents a rich tapestry of people, places, and experiences, and embodies a sort of collective memory starting with its discovery and extending into the present day. For me, at least, this is what natural history is all about.

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Filed under collections, dinosaurs, education, exhibits, field work, mammals, museums, reviews, science communication

October 11, 2017 · 11:56 am

National Fossil Day 2017

Everyone knows fossils are cool. They are the earthly remains of giant, fierce, fantastical, but very much real monsters from our planet’s distant past. But since today is National Fossil Day, it’s a good time to remember what else fossils are.

Fossils are cool: Alamosaurus, Tyrannosaurus, Mammuthus, and Quetzalcoatlus at the Perot Museum of Nature and Science.

Fossil plants and animals provide us with a long view of the Earth. After all, the past and the present are not different places, but parts of a single continuum. Fossils tell us how life has evolved and diversified in response to a changing planet, and ultimately tell us how the world we know came to be. We cannot hope to understand the world around us, much less how to preserve and protect it, without the fossil record. With the information provided by fossils, we can explore ways to mitigate the effects of climate change, habitat destruction, and other anthropogenic planetary changes by studying how life has responded to similar challenges in the distant past.

The fossil-filled painted desert at Petrified Forest National Park.

It’s also a good time to think about the institutions that make it possible for us to learn about the past through fossils. The United States has a noble tradition of establishing public lands – protected wilderness spaces that can be enjoyed by everyone. Land administered by the National Park Service, the Bureau of Land Management, and other federal and local agencies is the source of a plurality of the fossils found in the United States. Fossils found on public lands belong to the American people, and the aforementioned agencies keep those fossils safe and accessible by running interpretive programs and issuing collecting permits. They ensure that fossil collection on public lands is orchestrated in a professional way that will preserve all relevant contextual information.

The National Museum of Natural history has protected these rare Maryland sauropod fossils since the 1890s.

Fossils recovered from public lands live in museums. There are many words that are routinely used to characterize museums – mysterious, cavernous, prestigious, dusty. But to quote Stephen Weil, museums are also “rationally organized institutions directed toward articulable purposes.” Museums exist as a public service, with two clear aims: to protect and preserve objects that are worth protecting and preserving, and to provide opportunities for life-long learning in the communities they serve. Behind the scenes, small armies of skilled staff keep track of the specimens in their care, and protect them from the effects of light and pests and time. Indeed, a well-run museum collection is anything but mysterious and dusty – the precise location of each of the thousands or millions of objects is known, and each object is kept in good condition. Without museums, fossils would weather away, or would be hidden and eventually lost in a private collection. Museum collections exist to be used – they are made available to students and researchers seeking to learn new information about those specimens, and the most remarkable or informative examples are put on display.

And with that, I’ve said my piece. When you’re thinking about how awesome fossils are today, remember to thank the stewards of public lands and collections managers that have made our discovery of past worlds possible. Happy National Fossil Day – Peace, love, and fossils.

Reference

Weil, S.E. 2002. Making Museums Matter. Washington, DC: Smithsonian Books.

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Filed under collections, education, field work, museums, opinion, science communication

September 30, 2016 · 9:20 am

The National Fossil Hall Rejects

In April 2014, the paleontology exhibits at the National Museum of Natural History closed for a wall-to-wall renovation. The re-imagined National Fossil Hall will reopen in 2019. We are now approaching the halfway point of this journey, which seems like a fine time to say farewell to some of the more charismatic specimens that are being rotated off display.

In comparison to the old exhibit, the new version will be influenced by a less-is-more design philosophy. While there will not be quite as many individual specimens on display, those that are included will be more visible and will be explored in more detail. This combined with the significant number of new specimens being added means that many old mainstays had to be cut from the roster. Cuts occur for a variety of reasons, including eliminating redundancy, preserving specimens that were not faring well in the open-air exhibit space, and making specimens that have been behind glass for decades available to a new generation of researchers. Retired specimens are of course not going far – they have been relocated to the collections where students and scientists can study them as needed.

Stegomastodon (USNM 10707)

The Stegomastodon in 2014. Photo by the author.

The young male Stegomastodon is the largest single specimen that is being retired from the NMNH fossil halls. James Gidley and Kirk Bryan collected this skeleton in the San Pedro Valley of Arizona, during the same 1921 collecting trip that produced the museum’s Glyptotherium (which will be returning). While the genus Stegomastodon was erected in 1912, Gidley referred his specimen to a new species, S. arizonae, due to its more “progressive” physiology and slightly younger age. By 1925, the skeleton was mounted and on display in the Hall of Extinct Monsters. While the original mount used the real fossil tusks, these were eventually replaced with facsimiles.

There are at least two reasons the Stegomastodon will not be returning in 2019. First, there are already two big elephants on display: the mammoth and the mastodon. Elephants take up a lot of space, and a third proboscidean offers diminishing returns when compared to the amount of floor space it requires. More importantly, the Stegomastodon is a holotype specimen, and the exhibit team elected to remove most of these important specimens from the public halls. This is both to keep them safe from the damaging effects of vibration, humidity, and fluctuating temperature, as well as to make them more accessible to researchers.

Paramylodon (USNM V 15164)

Collections staff wheel Paramylodon out of the exhibit hall. Source

During the 1960s, Assistant Curator Clayton Ray oversaw the construction of the short-lived Quaternary Hall, which was reworked into the Hall of Ice Age Mammals. This meant creating a number of brand-new mounts, including several animals from the Rancho La Brea Formation in Los Angeles County. La Brea fossils are not found articulated, but as a jumble of individual elements preserved in asphalt. The Los Angeles Natural History Museum provided NMNH with an assortment of these bones, which preparator Leroy Glenn assembled into two dire wolves, a saber-toothed cat, and the ~~sheep~~ cow-sized sloth Paramylodon.

Paramylodon is another cut for the sake of eliminating redundancy: the colossal Eremotherium completely overshadows this more modestly-sized sloth. This mount also needed some TLC. For aesthetic reasons, the Paramylodon was given an internal armature, which involves drilling holes through each of the bones. Last year, preparator Alan Zdinak took on the task of disassembling and conserving these damaged fossils with assistance from Michelle Pinsdorf.

Zygorhiza (USNM PAL 537887)

Zygorhiza cast in the Life in the Ancient Seas gallery. Source

When the Life in the Ancient Seas gallery opened in 1990, it featured a historic Basilosaurus skeleton that had been on display since the 1890s. This ancestral whale was relocated to the Ocean Hall in 2008, and a cast of the smaller whale Zygorhiza took its place in Life in the Ancient Seas. Since there is now an extensive whale evolution exhibit in Ocean Hall, this subject will not be a major part of the new paleontology exhibit. Both Zygorhiza and the dolphin Eurhinodelphis will have to go.

After the old fossil halls closed, Smithsonian affiliate Mark Uhen managed to acquire the retired Zygorhiza mount for George Mason University, where he is a professor. The whale is now on display in the Exploratory Hall atrium, suspended 30 feet in the air.

Tapirs, Horses, and Oreodonts

The tapir Hyrachyus and the mini-horse Orohippus. Photo by the author.

The last two major renovations of the NMNH fossil exhibits occurred when mammal specialists were in charge of the Paleobiology Department, and as a result the halls ended up with a lot of Cenozoic mammal mounts (at least 50, by my count). Virtually every major group was covered, often several times over. This menagerie has been culled for the new hall, which will focus on specimens that best tell the story of Earth’s changing climate during the past 66 million years. Casualties include the trio of Hagerman’s horses, the smaller horse Orohippus, the tapirs Hyrachyus and Helaletes, the ruminant Hypertragulus, and the oreodont Merycoidodon. Interestingly, the classic hall’s three large rhinos are sticking around, and will in fact be joined by at least one more.

Brachyceratops (USNM 7953)

Brachyceratops/Rubeosaurus. Photo by NMNH Department of Paleobiology.

The pocket-sized ceratopsian historically called Brachyceratops has been on display at NMNH since 1922. Discovered in 1913 by Curator of Fossil Reptiles Charles Gilmore, this animal is one of only a few dinosaur species excavated, prepared, described, and exhibited entirely in-house at NMNH. Assembled by Norman Boss, the mount is actually a composite of five individuals Gilmore found together in northeast Montana.

Gilmore described Brachyceratops as an unusually small but full-grown ceratopsian, but in 1997 Scott Sampson and colleagues confirmed that all five specimens were juveniles. Unfortunately, the fossils lack many diagnostic features that could link them to an adult form. According to Andrew McDonald, the most likely candidate is Rubeosaurus. Nevertheless, without the ability to recognize other growth stages of the same species, the name Brachyceratops is unusable and is generally regarded as a nomen dubium.

It is not difficult to surmise why the Brachyceratops would end up near the bottom of the list of specimens for the new exhibit. It is not especially large or impressive, it doesn’t have a recognizable name (or any proper name at all, really) and it doesn’t tell a critical story about evolution or deep time. With limited space available and new specimens being prepped for display, little Brachyceratops will have to go.

Corythosaurus (USNM V 15493)

Corythosaurus as seen in the 1960s. Photo courtesy of the Smithsonian Institution Archives.

In 1910, Barnum Brown of the American Museum of Natural History launched the first of several expeditions to the Red Deer River region of Alberta. Seeing Brown’s success and under pressure to prevent the Americans from hauling away so much of their natural heritage, the Canadian Geological Survey assembled their own team of fossil collectors in 1912. This group was headed by independent fossil hunter Charles Sternberg, who was accompanied by his sons George, Levi, and Charles Jr. Having secured several articulated and nearly complete dinosaur skeletons, Brown’s team moved on five years later. The Sternbergs, however, remained at the Red Deer River, and continued to collect specimens for the Royal Ontario Museum.

In 1933, Levi discovered a well-preserved back end of a Corythosaurus, complete with impressions of its pebbly skin. The Smithsonian purchased this specimen in 1937 for use at the Texas Centennial Exposition. It eventually found its way into the permanent paleontology exhibit at NMNH. Unfortunately, the half-Corythosaurus ended up crowded behind more eye-catching displays and was often overlooked by visitors. In the new exhibit, it will have to move aside to make room for new Cretaceous dinosaurs.

Assorted Dinosaur Skulls

Original skull of Hatcher the Triceratops, one of many dinosaur skulls coming off exhibit. Photo by the author.

In addition to complete dinosaur mounts, the old NMNH fossil halls included several dinosaur skulls, ranging from the giant cast of the AMNH Tyrannosaurus to the miniscule Bagaceratops. Most of these standalone skulls have been cut, although a few (Diplodocus, Camarasaurus, and Centrosaurus) are sticking around, to say nothing of new specimens being added. Other retirees in this category include the original skulls of Nedoceratops (labeled Diceratops), Triceratops, Edmontosaurus, and Corythosaurus, as well as casts of Protoceratops, Pachycephalosaurus, Stegoceras, Psittacosaurus, and Prenocephalae.

As usual, the reasons these specimens are coming off exhibit are varied. The Nedoceratops skull is a one-of-a-kind holotype that has been the subject of a great deal of conflicting research over its identity and relevance to Maastrichtian ceratopsian diversity. Putting this specimen back in the hands of scientists should help clarify what this bizarre creature actually is. Meanwhile, many of the other skulls (e.g. Protoceratops, Psittacosaurus, and Prenocephalae) come from Asian taxa. In the new fossil hall, the Mesozoic displays will primarily focus on a few well-known ecosystems in North America.

Dolichorynchops (USNM PAL 419645)

Dolichorhynchops from Montana, mounted by Arnie Lewis. Photo by Chip Clark.

Dolichorhynchops in the Life in the Ancient Seas exhibit. Photo by NMNH Department of Paleobiology.

The NMNH Dolichorhynchops is a relatively new mount. It was collected in Montana in 1977 and acquired in a trade with the Denver Museum of Nature and Science. Arnie Lewis prepared it for display in 1987. 24 years later, “Dolly” is being retired to the collections. This is not due to anything wrong with the specimen, but to make way for a bigger, cooler short-necked plesiosaur. NMNH purchased a cast of Rhomaleosaurus from the Henry Ward Natural Science Establishment in the 1890s, but it has not been on exhibit since at least 1910. This cast, which is based on an original at the National Museum of Ireland (and which is identical to the cast at the London Natural History Museum) will make its first public appearance in over a century in the new National Fossil Hall. Sorry, Dolichorhynchops.

This has hardly been a comprehensive list – just a few examples that illustrate the decisions that are made when planning a large-scale exhibit. If you are curious about other favorites from the old halls, you can check on their fate by searching the Department of Paleobiology’s online database. Just go to Search by Field and enter “Deep Time” under Collection Name to see most of the specimens earmarked for the new exhibit.

References

Gidley, J.W. 1925. Fossil Proboscidea and Edentata of the San Pedro Valley, Arizona. Shorter Contributions to General Geology (USGS). Professional Paper 140-B, pp. 83-95.

Gilmore, C.W. 1922. The Smallest Known Horned Dinosaur, Brachyceratops. Proceedings of the US National Museum 63:2424.

Gilmore, C.W. 1941. A History of the Division of Vertebrate Paleontology in the United States National Museum. Proceedings of the United States National Museum Vol. 90.

Gilmore, C.W. 1946. Notes on Recently Mounted Reptile Fossil Skeletons in the United States National Museum. Proceedings of the United States National Museum Vol. 96 No. 3196.

McDonald, A.T. 2011. A Subadult Specimen of Rubeosaurus ovatus(Dinosauria: Ceratopsidae), with Observations on other Ceratopsids from the Two Medicine Formation. PLoS ONE 6:8.

Sampson, S.D., Ryan, M.J. and Tanke, D.H. 1997. Craniofacial Ontogeny in Centrosaurine Dinosaurs: Taxonomic and Behavioral Implications. Zoological Journal of the Linnean Society 12:1:293-337.

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Filed under collections, dinosaurs, exhibits, Extinct Monsters, fossil mounts, history of science, mammals, marginocephalians, museums, NMNH, ornithopods, reptiles, theropods

Tagged as exhibits, fossil mounts, museums, natural history museums, NMNH, paleontology, Smithsonian

September 13, 2016 · 2:55 pm

A Game Changer?

Today, Google and 60 partner museums unveiled the new natural history arm of the Google Cultural Institute. Launched in 2011, the Cultural Institute is an effort to make culturally significant material accessible online. Up until this point, the primary focus has been on art and history. In conjunction with museums and other institutions around the world, Google has been uploading millions of images, archival documents, and virtual walkthroughs of significant places. The natural history project offers more of the same, but with 100% more dinosaurs.

I had no idea this was in the works, nor do I know much beyond what is said in the press release. After spending much of this morning exploring the site, however, you can color me impressed. The sheer amount of content is overwhelming: 300,000 annotated specimen photos, virtual walkthroughs of 50 museums, and 184 multimedia presentations on topics both general (cabinets of curiosities) and esoteric (native plants and fish of Korea). Unfortunately, accessing this content can be a bit of a chore. I was often confused by the user interface, and found many of the most interesting or useful items by accident.

Somewhere in the Ancient Americas exhibit at the Field Museum of Natural History. Google Cultural Institute

For me, the museum walkthroughs are the clear highlight. Using Google’s Street View technology, users can explore the included museums and get surprisingly close to individual displays. Some of these “virtual tours” are frustratingly limited to a few corridors between exhibits, but others provide darn near the full experience of actually being there. Of the museum walkthroughs I’ve looked at so far, the National Museum of Natural History and Berlin’s Museum für Naturkunde are particular standouts in this regard. A handful of museums have had virtual tours available online since at least the early 2000s, but this is the first time I’ve seen the concept escape the gimmick stage and become something potentially useful.

The quality of the multimedia presentations (“virtual exhibits”, if you must) is a bit mixed. The best ones make specific use of the partner museums’ collections, highlighting the scientific, cultural, or historical significance of particular objects. These presentations provide curatorial expertise and novel insights that are not easily found elsewhere. Other presentations, however, are frustratingly generalized, and don’t include much content that one couldn’t get from skimming a Wikipedia article.

yawn, another cgi sauropod. I'd rather see the mount.

Yet another middling CGI dinosaur. Yay, I guess? Google Cultural Institute

I would include the site’s flagship attractions – narrated 360-degree tours of selected exhibit halls – in the second camp. These three short videos each feature an exhibit that “comes to life” with the help of some acceptable-but-not-spectacular CGI. Take the video about the Giraffatitan at the Museum für Naturkunde. It’s awesome to be able to look all around the hall, but most of the video is taken up by an animated version of the dinosaur that doesn’t accomplish anything it’s Jurassic Park counterpart didn’t 23 years ago. The video starts to tell some interesting stories – convergent evolution between sauropods and giraffes, the rate of extinction caused by human activities far outpaces normal background extinction – but the goofy CGI Giraffatitan is very much in the way. Museums have so many strengths, so I’ll never understand the impulse to rely on things like animated dinosaurs that a) their audience can see elsewhere and b) Hollywood will always be able to do better.

A great deal of content to be found by the bold.

A great deal of content can be found by the bold. Google Cultural Institute

All in all, the new natural history project at the Google Cultural Institute is a very impressive starting point. Nevertheless, my optimism is tempered by the fact that the web is littered with apps and mini-websites developed by museums, then almost immediately abandoned. Too often, digital projects are taken on without a clear idea of who will continue to update it, what need is being addressed, or even who the website or app is for. The real test will be whether Google and the partner museums will continue to support the Cultural Institute with new content. This has been a recurring problem with museums’ digital endeavors, but perhaps the collaboration with Google (and its extensive infrastructure) will help.

Moreover, accessibility is an admirable goal, but there is a very wide gap between putting stuff online and creating something that lots of people (teachers, students, people who don’t live near museums) actually want to use. I’m encouraged by the range of material on the Cultural Institute site. Some content is fairly general, perhaps suitable for a 3rd grade science report, while other content is far more in-depth. I will be very curious to see what the public ends up using, and for what purpose. It would also be neat to see if this ended up being the start of a truly global digital collection, useful for educators and researchers alike. We’ll see if the Cultural Institute ends up being the catalyst that finally makes digital museums happen!

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Filed under collections, dinosaurs, education, exhibits, museums, sauropods, science communication

Tagged as digital, education, Google Cultural Institute, museums, natural history museums, science communication, science education

March 11, 2015 · 8:43 pm

The Carnegie Quarry Diaspora

About 150 million years ago, a severe drought ravaged the western interior of North America. In eastern Utah, malnourished dinosaurs gathered near a dwindling river. Unwilling or unable to leave the water source, they eventually died of thirst or disease. When rain finally returned to the region, three or four successive flash floods washed dozens of animal carcasses into a relatively small depositional area to the southeast. Today, this site is known as the Carnegie Quarry at Dinosaur National Monument, and it is one of the most incredible fossil sites in the world.

Dinosaur National Monument interns collect data on the quarry wall. Source

Today, a structure encompassing a 180-foot section of the deposit (less than half its total length) allows visitors to view nearly 1400 dinosaur bones in situ. However, the fossils on display at Dinosaur National Monument represent only a portion of the material found at the Carnegie Quarry. Between the site’s discovery in 1908 and the establishment of the quarry wall exhibit, more than 20 reasonably complete dinosaur skeletons and dozens more incomplete specimens were excavated and distributed to museums in the US and Canada. No less than eleven mounted skeletons have been created from this material, and they are all still on display today. Although they are thousands of miles from their place of discovery and exhibited in four different cities, these mounts all represent individuals that lived and died in the same environment. They may have even encountered each other in life!

The Discovery

Earl Douglass was already an established fossil hunter when the Carnegie Museum of Natural History hired him in 1902. Late in the 1909 field season, Douglass was prospecting near the confluence of the Green and Yampa Rivers when he spotted a series of sauropod vertebrae eroding out of the rocks. Once Douglass and his crew began excavating the fossils, it became apparent that they had not just one remarkably complete dinosaur, but several. Douglass called it a “beautiful sight,” and CMNH director William Holland could barely contain his glee in his reports back to the Pittsburgh museum. Under Douglass’s management, CMNH crews worked at what became known as the Carnegie Quarry for 13 years. The dinosaur fossils were jumbled and often overlaid one another, so the excavators had to work on multiple skeletons simultaneously. The especially hard sandstone also slowed their work, and the team regularly resorted to huge horse-drawn plows and even dynamite to reach the fossils. Eventually railway tracks were installed to help transport blocks of sandstone out of the quarry.

In 1915, Holland successfully petitioned Woodrow Wilson to preserve the site as a national monument. CMNH crews continued to excavate until early 1923. At that point, their primary benefactor Andrew Carnegie had died, and funding for field work was dwindling. Other museums collected from the quarry periodically in the years that followed, but Douglass’s idea to contain the remaining fossils in an on-site museum was not realized until 1958.

The Mounts

CMNH Apatosaurus. Historic photo from McGinnis 1982; modern photo source.

Apatosaurus louisae – CM 3018

The CMNH Apatosaurus was the first dinosaur discovered at the Carnegie Quarry. After Douglass first spotted the articulated caudal vertebrae in August of 1909, his crew spent several months extracting the rest of the skeleton from the rocks. The excavation continued into early 1910, and by the time they were finished they had the most complete Apatosaurus ever found – a title the specimen holds to this day. Holland mounted the 77-foot skeleton alongside the museum’s Diplodocus in just three years, at the time a record for a sauropod mount.

Holland famously left his Apatosaurus headless for decades due to a disagreement with Henry Osborn of the American Museum of Natural History. Douglass recovered a skull that almost certainly belonged to the Apatosaurus, but Holland opted not to use it because it contradicted the sculpted head already in place on the AMNH Apatosaurus mount. After Holland’s death in 1932, museum staff quietly added a casted Camarasaurus skull as a placeholder. This was finally replaced with a proper Apatosaurus skull in 1979. More recently, the team at Phil Fraley Productions disassembled and restored the Apatosaurus, along with the rest of the classic CMNH dinosaurs. Since 2007, this specimen has been back on display in a more graceful modern pose.

AMNH Barosaurus. Source

Barosaurus lentus – AMNH 6341

When the CMNH team discovered this skeleton in 1912, they assumed it was yet another specimen of the well-known Diplodocus. It was harvested for parts, with portions sent to CMNH, the United States National Museum, and the University of Utah to supplement their displays. When the specimen turned out to be the more obscure sauropod Barosaurus, it languished in pieces for many years. Barnum Brown of AMNH was making a circuit of the fossil collections at various natural history museums when he rediscovered this specimen. Through a series of purchases and trades, the Barosaurus was reunited at AMNH in 1929.

Nevertheless, AMNH quickly abandoned plans to mount the Barosaurus – the museum already had a sauropod on display, and there wasn’t enough floor space for another one. It wouldn’t go on display until 1991, when Lowell Dingus conceived of the idea to mount the Barosaurus in a spectacular rearing pose as part of the renovation of the Theodore Roosevelt Rotunda. Peter May took on the project – one of the first mounts produced by his company Research Casting International. The resulting display, actually a cast, is the tallest free-standing dinosaur mount in the world.

ROM Barosaurus. Source

Barosaurus lentus – ROM 3670

Douglass recovered a second partial Barosaurus skeleton in 1912, which consisted of a mostly complete torso and parts of each leg. It stayed in the CMNH collections for many years, until they traded it to the Royal Ontario Museum in 1962. ROM staff intended to mount the skeleton, but once again this was cancelled due to a lack of space. David Evans was developing a new ROM paleontology exhibit in 2007 when he learned that the museum had most of a Barosaurus sitting in its collections. With only weeks remaining before the exhibit’s opening, Evans tapped Research Casting International to mount the sauropod, supplemented with a replica neck and tail from the AMNH version.

CMNH Allosaurus. Historic photo source; modern photo source.

Allosaurus fragilis – CM 11844

Several Allosaurus specimens are known from the Carnegie Quarry, but the one on display at CMNH is one of the largest. Douglass and his team excavated this 35-foot skeleton between 1913 and 1915. The mount was built in 1938. Although the specimen included a partial skull, the exhibit team swapped it with a cast of a more complete skull (also found in the Carnegie Quarry) from the collections of the University of Utah. This mount also includes casts of the arms of USNM 4734, an Allosaurus collected for O.C. Marsh.

CMNH Stegosaurus. Historic photo source; modern photo source.

Stegosaurus ungulatus – CM 11341

The CMNH Stegosaurus is a composite of several individuals excavated from the Carnegie Quarry between 1920 and 1922. Museum staff completed the 21 foot-long mount in 1940, using a skull cast from USNM 8612. Casts of this skeleton were distributed to several other museums at some point, one of which is on display at the University of Nebraska State Museum. Phil Fraley’s company remounted the CMNH original in 2007.

Carnegie Camarasaurus. Source

Camarasaurus lentus – CM 11338

This juvenile Camarasaurus is the most complete sauropod ever found. It is displayed as a relief mount almost exactly as it was discovered, with two exceptions. The left leg was swapped with a more complete one from another individual, and the tail was re-positioned to create a more aesthetically pleasing mount. Casts of this skeleton are displayed at museums throughout the United States, including Dinosaur National Monument, but the original is at CMNH. ~~This specimen is also notable because its left scapula is preserved in its life position, making it a helpful model for skeletal reconstructions and exhibit mounts.~~

NMNH Camarasaurus. Photo by the author.

Camarasaurus lentus – USNM 13786

The second best Camarasaurus also comes from Carnegie Quarry, but it is a considerably larger individual. Only the tail and a few odds and ends were missing. CMNH kept the specimen for several years before trading it to USNM in 1933 for a set of Pliocene horse skeletons. Norman Boss prepared the specimen in full view of the public during the 1936 Texas Centennial Exposition – one of the first known examples of such an exhibit. The completed mount appeared at USNM in the 1950s, sporting the tail of another Camarasaurus. At over 30 feet long, this skeleton is one of the largest dinosaurs on display at the Smithsonian. Unfortunately, the death pose somewhat limits the effect. The Camarasaurus was taken off exhibit in late 2014 for conservation and remounting. When it returns, it will be standing on its feet for the first time in 150 million years, taking its rightful place as one of the museum’s most impressive dinosaurs.

DMNH Diplodocus. Source

Diplodocus longus – DMNH 1494

Since this Dipldodocus was found somewhat disarticulated, Douglass suggested that the carcass may have been twisted apart while rolling downstream. AMNH held on to this skeleton for some time before trading it to the Denver Museum of Nature and Science in 1936 for two mammoth skeletons. Preparator Phillip Reinheimer mounted the skeleton with the help of 40 workers assigned to the museum through the Works Progress Administration. Additional Diplodocus fossils collected by William DeWeese (actually the first dinosaur specimens acquired by the museum) were also used to complete the mount. The Diplodocus remained on view until 1989, when Ken Carpenter and others restored and remounted the sauropod, elevating its tail and making its neck sweep gracefully to the left. The improved mount has been on display since 1995.

CMNH Camptosaurus. Historic photo from McGinnis 1982; modern photo source.

Camptosaurus aphanoecetes – CM 11337

Douglass found this controversial small ornithopod in 1922, and correctly matched it with an isolated leg several feet away. It was first identified as Camptosaurus medius, but in 2008 Ken Carpenter reassigned it to the new species C. aphanoecetes. A 2011 phylogenic study by Andrew McDonald moved this specimen to a new genus, Uteodon. Carpenter, however, asserts that McDonald’s analysis was based on an incorrectly associated Dryosaurus braincase.

CMNH staff assembled the fossils into a relief mount in 1940. The skull, hindfeet, and tail were all sculpted. During the 2007 renovation, the Phil Fraley Productions team extracted the fossils from the plaster slab, even managing to preserve the delicate ossified dorsal tendons. They then created a new, three-dimensional mount, which features a revised replica skull.

CMNH Dryosaurus. Historic photo from McGinnis 1982; modern photo by the author.

Dryosaurus altus – CM 3392

This Dryosaurus skeleton is the most complete of several collected at Dinosaur National Monument. The tail is missing, and given the completeness of the rest of the skeleton it may well have been destroyed when Douglass’s crew was blasting through rock to get to the bone layer. The Dryosaurus entered the CMNH collections in 1922, and was assembled as a 9 foot-long relief mount in 1940. In 2007, Fraley’s team removed the fossils from the plaster matrix, and just as they did with the Camptosaurus, constructed a standing mount. To date, this is the only mounted Dryosaurus specimen in the world. It is displayed alongside a juvenile Ceratosaurus cast acquired from Western Paleontological Laboratories.

National Museum of Natural History in Washington, DC.

NMNH Diplodocus. Photo by the author.

Diplodocus sp. – USNM 10865

The National Museum of Natural History’s Diplodocus was one of the last articulated skeletons removed from the Carnegie Quarry. When the CMNH crew closed up shop, Charles Gilmore of the Smithsonian moved in to recover one of the sauropod skeletons Douglass left behind. In 1923, Gilmore’s team excavated a partial Diplodocus, and also cherry-picked a few extra bones from an adjacent specimen. The process of mounting the skeleton at USNM took six years of continuous work, and Gilmore would later describe it as the most ambitious undertaking his department hadever attempted. The 70-foot Diplodocus mount was completed in 1931, and remained unchanged for more than 80 years. It was finally taken down in December 2014, and will return in a new pose in 2019.

Addendum: Mike Taylor recently called attention to a gorgeous map of the entire deposit prepared by Ken Carpenter, which was what prompted this post. Check it out here.

References

Carpenter, K. (2013). History, Sedimentology, and Taphonomy of the Carnegie Quarry, Dinosaur National Monument, Utah. Annals of the Carnegie Museum 81:3:153-232.

Dingus, L. (1996). Next of Kin: Great Fossils at the American Museum of Natural History. New York, NY: Rizzoli International Publications, Inc.

Gilmore, C.W. (1941). “A History of the Division of Vertebrate Paleontology in the United States National Museum.” Proceedings of the United States National Museum 90.

McGinnis, H.J. (1982). Carnegie’s Dinosaurs: A Comprehensive Guide to Dinosaur Hall at Carnegie Museum of Natural History, Carnegie Institute. Pittsburgh, PA: The Board of Trustees, Carnegie Institute.

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Filed under AMNH, CMNH, collections, dinosaurs, DMNS, exhibits, field work, fossil mounts, history of science, museums, NMNH, ornithopods, sauropods, theropods, thyreophorans

Tagged as amnh, CMNH, dinosaur national monument, dinosaurs, fossil mounts, fossils, history of science, museums, NMNH, paleontology, ROM

September 2, 2013 · 1:28 pm

In Defense of New Museums

As a museum* educator, I work with two kinds of experts: researchers who create knowledge and education specialists who disseminate knowledge. Both groups have ostensibly the same mission, which is to effectively communicate credible information about the world around us. Generally, both sides collaborate effectively, due in no small part to a shared enthusiasm for their work. But there is one issue (that has been raging for decades) in which researchers and educators frequently seem to be shouting past each other, complaining about what one another are doing wrong but not making much progress in reconciling their priorities. This issue is, of course, “new museum” exhibit aesthetics, the trend toward replacing traditional academically-oriented displays of specimens with dynamic, interactive leaning experiences that use specimens alongside interactive activities and multimedia to communicate specific educational messages to a broad audience.

*When I say museum, I mean natural history or science museum. Art museums are a completely different beast, and one I won’t pretend to understand.

From the perspective of many researchers and certain sets of museum-goers, these newer exhibits are frivolous lowest-common-denominator attractions better suited to amusement parks than serious institutions. For example, in a recent Tetrapod Zoology review of the London Natural History Museum’s Extinction exhibit, Darren Naish criticizes computer-based interactive exhibits because they “take up space that really should be spent on something far more worthwhile” and “give visitors the excuse to do the same old crap they do every other day of their lives (look at screens, play videogames, use touchscreens) when they really could be treated to a more unique experience.” Likewise, an all-encompassing rant about new museums can be found in this (admittedly 6 year old) post by Matt Wedel, which is well worth a read (seriously, read it now and then come back to this).

The Hunterian Museum as it appeared in the 1600s: all of the specimens, not much else.

The Hunterian Museum as it appeared in the 1800s: ALL OF THE SPECIMENS.

But in direct contrast to Wedel’s insistence that the intrinsic value of real specimens is all museum-goers want or need, there are editorials like this one by James Durston, which I will charitably describe as provocative. Durston tells us that museums that only display artifacts for their own sake are “classrooms made of cold granite, the only sense of life emerging from the tourists.” He argues that most objects on display in museums don’t matter as much to visitors as museum workers think they do, and pleads for more context and more reason to care.

So what’s the deal? Are modern museums too focused on providing context for their collections, or not focused enough? Let me begin by explaining why modern museum exhibits look the way they do. A century ago, or even 50 years ago, exhibits were arranged and labels were written almost exclusively by expert curators. These exhibits were, by and large, created with an audience of “interested people” in mind, meaning either other experts or clientele with enough leisure time to learn the jargon presented to them. The majority of visitors who came through the door were not directly catered to, because exhibits were considered an afterthought to the real work of the museum: research and collections management.

In the past 30 years, however, the museum field has decided that it can do better. Museums shifted from inwardly focused, primarily academic institutions into focal points for lifelong learning that operate in service to a wide community of visitors. Go to the website of your favorite museum and check out their mission statement (it should be pretty easy to find). I just did, and the mission of the National Museum of Natural History is to “increase knowledge and inspire learning about nature and culture, through outstanding research, collections, exhibitions, and education, in support of a sustainable future.” Note that the museum doesn’t seek to increase knowledge and inspire learning just for a core audience of studious, well-read people, but for everyone. That means the museum needs to offer content that is interesting to all sorts of people, whether they learn best by reading and absorbing information, by physically doing something, by making choices for themselves or by discussing an issue with others. Preserving and studying collections is no less important than in museums of yore, but these activities are understood to be in service of providing knowledge to the widest possible audience.

This shift in focus has inspired museum exhibits with more explicit educational goals, as well as attempts to create learning experiences that reach visitors other than those already keyed in to the customary language of academia. Drawing heavily on Gardner’s multiple intelligences, modern exhibits are intended to cater to diverse audiences that learn in a variety of different ways. In particular, hands-on mini experiments and computer-based games have become staples in science exhibits in order to reach visitors who learn better by doing than by observing. These interactive elements (we just call them interactives in the biz) are not appealing to everyone, but museums serve a broad community and have no business being exclusionary in the services they provide.

Beyond any moral or educational imperative, however, modern museums must be accessible because they are nonprofit institutions that rely heavily on public funds. They are funded based on the promise that they will provide educational resources for their communities, and that means serving more than a small subset of the population. Furthermore, ever-tightening budgets mean that museums need to be strictly managed. Educators have no choice but to establish clear standards of success for their exhibits, and to develop means to track attendance and audience engagement. Just to keep our jobs and keep museum doors open, we need to be able to clearly articulate who we are serving, how we are benefiting them and how we know.

The new Ocean Hall at NMNH: a $90 million new museum extravaganza.

The new Ocean Hall at NMNH: a $50 million new museum extravaganza.

If it was not clear, I absolutely agree with the goals behind new museum design. As was argued in the American Alliance of Museums’ 1984 “Museums for a New Century” commission report, “if collections are the heart of museums, what we have come to call education – the commitment to presenting objects and ideas an an informative and stimulating way – is the spirit.” General audiences can certainly experience awe and wonder when presented with neat stuff, but museums can and should provide more than that. A hundred birds from around the world look impressive on a shelf, but they are much more interesting when the viewer understands the evolutionary processes and biogeography that produced such diversity. A little bit of context goes a long way to making such an exhibit is accessible and valuable to the widest possible audience.

In practice, however, I will concede that many attempts at broadening the appeal of natural history exhibits are pretty bad. Some modern museum exhibits use technology in terrible ways, and many attempts to increase interactivity are bafflingly pointless or even counterproductive. For instance, a dinosaur exhibit I visited earlier this year includes a green-screen stage where visitors can place themselves in a scene with dinosaurs running around. The result is not only painfully dated, but it has no educational purpose and may well encourage people to think that humans and dinosaurs once co-existed. Likewise, an exhibit on human evolution features a glorified photo booth that makes visitors’ faces look like other hominids. This non-educational attraction is consistently the most popular element of the gallery, distracting visitors from the fantastic displays and specimens all around it. More generally, an increasing number of exhibits are incorporating profoundly pointless touch-screen computers that let visitors browse photos of the specimens on display right in front of them. Just because an exhibit element is hands-on doesn’t mean it is actually helping visitors interact with exhibit content.

One reason lousy interactives keep being designed is that our evaluation procedures* are not always great at separating good exhibits from appealing ones. A good interactive provides informative content in an engaging way, while an appealing one is engaging but lacking in content. Many visitors may speak highly of just-appealing interactives, but that doesn’t mean these belong in museums. The aforementioned budget woes are also a factor here: interactives that draw crowds for any reason are a big help when scrounging for ways to fund research and preservation. There are tough calls to make when deciding between what visitors most want to see and what is actually worthy of an educational institution. There are no easy answers, especially when museums are consistently hurting for funding.

*Do note, however, that actually testing whether exhibits are meeting their educational goals has finally become commonplace…for far too long museum workers just assumed anything they made was good enough.

Nevertheless, when an interactive display works, when visitors’ eyes light up with understanding by working out a scientific problem for themselves, the process is absolutely worthwhile. Earlier this year, I raved about the low-tech brilliance of an activity in the Academy of Natural Sciences that let visitors physically act out the difference in upright and sprawling gaits. And the NMNH Human Origins exhibit features a fantastic computer game where visitors play the part of a future world leader and experience firsthand the challenges and consequences of overpopulation, food shortage and invasive species. Exhibit interactives, both technology-based and otherwise, are difficult to pull off, and many museums have failed at the task. But we owe it to our visitors to try.

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Filed under collections, education, exhibits, history of science, museums, opinion, science communication

August 6, 2013 · 7:52 pm

The Gilmore Models: Where are they now?

Regular readers of this site (if there are any) undoubtedly know Charles Whitney Gilmore as the Smithsonian paleontologist who, between 1903 and 1964, led in the creation of most of the mounted dinosaur skeletons that remain on display at the National Museum of Natural History today. You don’t necessarily have to be in Washington, DC to see Gilmore’s reconstructions, however. In addition to being an expert anatomist and fossil preparator, Gilmore was a formidable sculptor, and during his tenure at the Smithsonian he produced a number of gorgeous life reconstructions of prehistoric animals. Plaster copies of these models were gifted or sold to large and small museums in North America and Europe, including the Sternberg Museum of Natural History, the University of Kansas Natural History Museum and the Hunterian Museum at the University of Glasgow. These models were typically displayed alongside isolated fossil elements to give a sense of the entire animal at institutions where complete mounts were unfeasible.

Charles Gilmore, or Chucky G, as he was known to his friends.

Unfortunately, many of the museums that acquired copies of Gilmore’s models in the 1920s and 30s seem to have lost the detailed provenance of these acquisitions (not a rare occurrence, as museums must track literally millions of objects and historic records on paper do not always survive). The Hunterian Museum has the best records regarding these models that I am aware of, and incidentally their online catalog is the source of most of the photographs in this post.

Stegosaurus model in plaster of paris. Image courtesy of the Hunterian Museum and Art Gallery.

While Gilmore’s models are obviously far from accurate by modern standards, a closer inspection reveals that Gilmore was familiar with every inch of the fossils in his care, and put that knowledge to use in his sculptures. The Stegosaurus above, for instance, is a perfect match for Gilmore’s full-sized mount in terms of pose and proportion. Undoubtedly, physically assembling an actual skeleton is among the best ways to become familiar with how an animal would work in three dimensions. In particular, note that unlike many contemporary reconstructions, Gilmore did not fudge the number or position of the plates; they’re all accounted for.

Triceratops model in plaster of paris. Image courtesy of the Hunterian Museum and Art Gallery.

The Triceratops model exhibits a number of interesting choices. The classic bowed ceratopsian forelimbs (which Gilmore first proposed after finding no other way to articulate them in his 1905 Triceratops mount) are clearly in evidence, but my eye is drawn to the scrawny, lizard-like hindlimbs. Comparing this model to Gilmore’s mount, there would appear to be virtually no muscle back there. The size of the head is yet another remnant of the mounting process. Since his Triceratops mount was a composite of numerous specimens, Gilmore used the skull of an inappropriately small animal, and apparently carried the chimeric proportions to this sculpture. The lack of cheeks and extremely thick neck are also characteristic of older ceratopsian reconstructions, although I can’t comment on precisely when or why that look went out of style.

Diplodocus model in plaster of paris. Image courtesy of the Hunterian Museum and Art Gallery.

This Diplodocus has a much more defined shape than most mid-century sauropod reconstructions. Note in particular the sloping back, which peaks at the sacrum. This differs from the 1907 Diplodocus mount at the Carnegie Museum of Natural History, which had a completely horizontal spinal column. When Gilmore led the creation of the Smithsonian Diplodocus mount, he had the opportunity to use a vertebral column that was found articulated in situ, and was thus able to more accurately portray the shape of the animal’s midsection.

Ceratosaurus. Image courtesy of the Hunterian Museum and Art Gallery.

Gilmore’s Ceratosaurus is the liveliest of the set, and is the only one that doesn’t strictly adhere to the pose of a corresponding fossil mount. Delivering a killing blow to a hapless ornithopod, one can easily imagine the energetic pounce that preceded this scene. I will point out, though, that this guy’s hindquarters are enormous.

Gilmore's stub-tailed Dimetrodon. Image from Gilmore 1939.

Gilmore’s stub-tailed Dimetrodon model.

Gilmore also sculpted some non-dinosaurs, including at least one prehistoric horse and the Dimetrodon pictured above. Note the teensy stub of a tail, which this model actually shared with Gilmore’s mount of the pelycosaur. The lips obscuring most of the teeth except for a couple incisors is an unusual choice, and I’m not sure what inspired it. This image is from Gilmore’s 1939 paper on Dimetrodon, and the Basiliscus basiliscus in the corner provides a helpful comparison to a contemporary animal with a similar dorsal sail.

In addition to the models shown here, Gilmore created sculptures of “Anatosaurus”, “Brachyceratops” and a Cenozoic horse, as well as busts of Styracosaurus and Corythosaurus (and there may well have been others I haven’t seen). As mentioned, copies of these mounts were distributed to museums and possibly private collections throughout the 20s and 30s, and I have no idea how many were actually made. A few museums, such as the Sternberg Museum, actually have these models on display, but at other institutions they have been relegated to storage. Objects like these present an unusual challenge for collections managers. They were accessioned as scientific representations, but their value has shifted over the last century to the realm of art and history. While these models are undoubtedly important, they are probably no longer useful at many of the institutions that hold them. As such, the Gilmore models exemplify that museum collections are not necessarily static, but change in meaning as the years go by.

If you work at an institution that has one or more Gilmore models in its collection, feel free to leave a comment. I’d love to start a working database of where copies of these models have ended up!

References

Gilmore, C.W. (1939). “A Mounted Skeleton of Dimetrodon gigas in the United States National Museum, with Notes on the Skeletal Anatomy.” Proceedings of the US National Museum 56:2300:525-539.

Gilmore, C.W. (1932) “On a newly mounted skeleton of Diplodocus in the United States National Museum.” Proceedings of the United States National Museum 81:1-21.

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Filed under collections, dinosaurs, history of science, NMNH, paleoart, reptiles

Tagged as dinosaurs, Gilmore, museums, natural history museums, NMNH, Smithsonian

May 2, 2013 · 5:52 pm

Allan McCollum’s fossil art

Click here if the embedded video doesn’t work.

My first love is natural science, but I also fancy myself an amateur art enthusiast, particularly for performance and installation pieces from the last 50 years or so. I am fascinated by art that directly engages the viewer, art that is not complete without the involvement of the spectator. As it happens, mounted fossil skeletons are a great example of installation art, although they are not deliberately constructed as such. The size and presence of a dinosaur skeleton, such as the Stegosaurus below, necessarily incorporates the viewers’ human scale into the experience. Viewers are not merely spectators but participants in a shared performance. Nevertheless, fossils are nearly always displayed and interpreted as scientific specimens, rather than art objects.

Stegosaurus fossil mount and life-size model circa 1913. Photo courtesy of the Smithsonian Institution Archives.

Stegosaurus fossil mount and life-size model at USNM circa 1913. Photo courtesy of the Smithsonian Institution Archives.

One important exception occurs in the work of prolific New York-based artist Allan McCollum. McCollum’s installations frequently address repetitive labor and industrial manufacturing, often incorporating hundreds or thousands of similar but subtly unique objects. Each piece is the product of many small actions, gradually assembled over time. In the early 1990s, the artist turned his attention to fossils, particularly their historic meaning and aesthetic appeal.

“Lost Objects” by Allan McCollum. Image from Art21.

In 1991, McCollum collaborated with the Carnegie Museum of Natural History to produce “Lost Objects”, displayed next door at the Carnegie Museum of Art. Using molds taken from dinosaur fossils (apparently all limb bones) in the CMNH collection, the artist produced several hundred fossil casts for the installation shown above. To me, this piece is a reflection on the global sharing of fossil material permitted by casting technology. In the Art21 video at the top of this post, McCollum briefly discusses the prominence of casts among the dinosaur mounts that are a staple at natural history museums. Dinosaur skeletons are virtually never found complete, and mounts are often filled in with casts of specimens held by other museums. For example, the National Museum of Natural History Diplodocus mount incorporates casts of the left hindlimb and much of the neck of the Carnegie Diplodocus. What’s more, casted duplicates of the entire Carnegie Diplodocus can be seen in London, Berlin and several other cities in Europe and Latin America, and casts of the American Museum of Natural History Tyrannosaurus are on display in Denver and Philadelphia. It would be an impressive sight if all the casts of certain fossil specimens scattered around the world were reunited in one room, a monument to the knowledge gained from a century of scholarly collaboration. It would also commemorate the intangible excitement generated by dinosaur mounts, made possible only through the duplication and sharing of casts.

MCollum also comments that “there aren’t as many dinosaur bones in the world as we think.” Perhaps, then, “Lost Objects” is a reflection on the scarcity of intact fossils, by showing an impossibly large collection that no museum could hope to amass. Let’s just hope he wasn’t trying to comment on the alleged mass-production of casts cheapening the original fossils and the museums that hold them, because he’d be dead wrong (EDIT: He wasn’t, see comments).

“Natural Copies” by Allan McCollum. Image from Art21.

In 1995, McCollum followed up on “Lost Objects” with “Natural Copies, a series of casted dinosaur footprints produced in collaboration with the College of Eastern Utah Prehistoric Museum. For the artist, this piece was a reflection on the idea that 150 million-year-old fossils can be valued as cultural history. The footprints in question were found by the hundreds in a Utah coal mine. While many ended up at the museum, others were collected by miners to display at home. The fossils took on a second life as symbols the community’s workforce and natural heritage, irrelevant to the dinosaurs that produced the tracks but important all the same. McCollum’s work separates the fossils from their typical scientific context so that viewers may reflect on their cultural meaning and even the aesthetic beauty of their form.

So what’s the point of these installations? These appropriations of fossils as aesthetic pieces has no bearing on the science of paleontology, and in fact may obscure information about how the animals that left these traces lived and behaved. And yet, from the moment a fossil is first seen by human eyes, whether it is an ammonite preserved in a split open rock or the glint of a vertebrate bone weathering out of a hillside, it becomes meaningful on a human scale. For the discoverer, the researcher who describes the fossil, the institution that holds it in its collection and the visitor who sees the fossil on display, that specimen has cultural value. This does not diminish the value of fossils as natural specimens, but rather enhances their importance.

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Filed under collections, dinosaurs, fossil mounts, museums, paleoart

Tagged as art, Carnegie Museum, dinosaurs, fossils, museums

March 18, 2013 · 4:45 pm

A Visit to the Academy of Natural Sciences

I spent yesterday in Philadelphia, my first visit in at least 10 years, and of course made a point of visiting the Academy of Natural Sciences. Founded in 1812, the Academy is the oldest natural science research institution and museum in North America, established “for the encouragement and cultivation of the sciences, and the advancement of useful learning.” Initially formed as a hub for research on the American frontier, the Academy has sponsored scientific expeditions across the world and has amassed a collection of 17 million specimens that is still actively used 200 years after its founding.

In 1868, the Academy museum made a landmark contribution to paleontology by hosting the first mounted dinosaur skeleton ever constructed. The mount, the work of paleontologist Joseph Leidy and sculptor Benjamin Waterhouse Hawkins, depicted Hadrosaurus foulki, the first dinosaur discovered in North America and at the time the most complete dinosaur ever found. With only two limbs, a section of the spinal column and some other odds and ends to work with, Hawkins invented many of the mounting techniques that are still in use today. For instance, Hawkins created mirrored duplicates of the left limb bones for use on the animal’s right side, and reconstructed best-guess stand-ins for the skull, scapulae and most of the vertebrae using extant animals as reference. By modern standards, the Leidy-Hawkins Hadrosaurus mount wasn’t especially accurate (the sculpted scapulae and vertebrae resemble those of a mammal, not a reptile; the skull, based on that of an iguana, turned out to be completely off the mark; the fully upright, kangaroo-like posture is now known to be anatomically implausible), but it nevertheless presented the first-ever opportunity to stand in the presence of a dinosaur. Extinct animals were already known to the public, and some had even been mounted, but the Hadrosaurus was so bizarre, so utterly unlike anything alive today, that it really opened people’s eyes to the unexplored depths of the Earth’s primordial history.

Original 1868 Hadrosaurus mount.

The Hadrosaurus display caused public visitation to skyrocket, prompting the Academy to relocate in 1876 to a larger building in central Philadelphia, where it remains today. I haven’t been able to find any photographs or detailed information about it, but for much of the 20th century the Academy had a fossil exhibit with a Corythosaurus mount as its centerpiece. This was replaced in 1986 with an expanded “Discovering Dinosaurs” exhibit, which apparently was among the first to showcase the discoveries of the dinosaur renaissance. This exhibit has just about zero web presence, as well (seriously, any help tracking down details about it would be greatly appreciated). The current version of the Dinosaur Hall opened in 1998, and is what I will discuss below.

This cast of the AMNH Tyrannosaurus is the centerpiece of the Dinosaur gallery. Source: Wikipedia Commons.

What’s Cool

Although crammed into a fairly small space, the Academy’s two-level Dinosaur Hall is packed with mounts of North American fossil reptiles, including Tyrannosaurus, Chasmosaurus, Deinonychus, Tylosaurus, Pachycephalosaurus and many more. Compared to the sterile and coldly scientific displays at larger museums like the American Museum of Natural History, the Academy’s exhibit designers clearly put an emphasis on accessibility, particularly for younger visitors. Signs are attractive, colorful and use simple language, but do not sacrifice scientific accuracy. Although “Do Not Touch” notices abound, guardrails are low and allow visitors to view the mounts up close. Even the fossil prep lab, a staple in paleontology exhibits, is not behind glass but is separated from visitors by a low wall, allowing guests to converse freely with the preparators if they so choose (This might not be so fun for the preparators; I’ve worked in a couple of these labs and I’ll be the first to admit that our conversations are not always for public ears).

The Academy’s Dinosaur Hall is also filled with interactive activities. I question the educational value of a green-screen that places visitors into a scene with dinosaurs running around (the last thing we need is to encourage more people to think humans and dinosaurs coexisted), but many of the other interactives are quite inspired. In one corner, children are encouraged to climb inside a Tyrannosaurus skull cast to find evidence for its diet and lifestyle. Crouching between its jaws, kids find partially-erupted teeth, evidence that the predator broke and regrew teeth throughout its life. My favorite interactive, however, featured parallel rows of theropod and crocodile footprints on the floor. Visitors were directed to walk down each trackway, comparing how it felt different to move with an upright or sprawling gait. At the end, a sign explained that it’s harder, and less energy efficient, to move like a crocodile. I loved this activity because it was simple (just images on the floor, no technology required) and yet conveyed a clear explanation of biomechanics. Visitors use their own bodies to reach the conclusion, finding the answer in a tactile and experiential way that is more memorable than just being told that a sprawling posture is inefficient.

Overall, the Dinosaur Hall is a great overview of dinosaur science. It focuses on the biology of dinosaurs, emphasizing their similarity to animals we know today, and how scientists can draw conclusions about past life by studying the modern world. This content is communicated in a way that is clear and engaging for visitors of all ages, making this exhibit a good example of the old adage that all good science can be explained in simple terms. When I visited, there were a couple children using the open exhibits like a playground, but for the most part I think this highly accessible dinosaur exhibit is quite successful.

What’s Not So Cool

The Academy’s Dinosaur Hall is 15 years old, and is in some places showing its age. Some of the exhibit content is not entirely up-to-date; for instance, a display on the relationship between birds and dinosaurs leaves the question completely open ended. I also saw at least two invalid names, “Majungatholus” and “Ultrasauros”, used on labels. Probably more obvious to most visitors is the general wear and tear visible in certain parts of the exhibit. Some labels, particularly those facing large windows, are badly faded. The Elasmosaurus mount was moved from the Dinosaur Hall proper to the entrance lobby at some point, but Elasmosaurus signage, now labeling an empty space, is still in place in the exhibit. I got the impression that the Academy, like much of Philadelphia, is hurting for funding.

Corythosaurus and Chasmosaurus mounts. Source: TravelMuse.

The story of Leidy’s Hadrosaurus appears in several places throughout the museum. Casts of the original fossil material are displayed over a silhouette of the dinosaur toward the back of the Dinosaur Hall. Elsewhere , there is a new full casted mount of Hadrosaurus (signs explain that it is filled in with Maiasaura material), and the original tibia is displayed as part of a rather cool 200th Anniversary special exhibit. At the time, I wished that these displays were consolidated in one place, since the Hadrosaurus story is an important chapter in the history of science and of museums that can be seen exclusively at the Academy. I later found out that in 2008, the Academy had a major temporary exhibit commemorating the 150th anniversary of the original Hadrosaurus mount, which featured, among other things, a recreation of the victorian-era exhibit and the workshop of Benjamin Waterhouse Hawkins (great videos and interviews about the exhibit here). I wish I had been able to see that, because it blends the scientific, cultural and historic value of fossil mounts in a way that only this museum can.

The sadly closed Hadrosaurus Anniversary exhibit. Note Hawkins’ original sculpted head on the red pillow. Source: The Art Blog.

The current centerpiece of the Dinosaur Hall is a cast of the AMNH Tyrannosaurus. It’s neat, but I imagine most visitors would be more enthused to see the real one just a couple hours down the road. Indeed, most of the dinosaurs on display at the Academy are casts from other institutions. I have no problem with displaying casts, but I can’t help but feel that this generalized dinosaur exhibit is underselling the Academy’s own fossil collections, not to mention its contributions to paleontology. Should the Academy renovate this space again, I’d love to see the institutions’ unique history play a more prominent role, as well as the work that Academy-affiliated researchers are doing today.

Category Archives: collections

Rhinos too thick: Fossils and flattery at Agate Springs

The setting

Dueling quarries

Playing nice

You get a rhino block, and you get a rhino block…

References

Paleontology Exhibits of California – Part 2

National Fossil Day 2017

Reference

The National Fossil Hall Rejects

Stegomastodon (USNM 10707)

Paramylodon (USNM V 15164)

Zygorhiza (USNM PAL 537887)

Tapirs, Horses, and Oreodonts

Brachyceratops (USNM 7953)

Corythosaurus (USNM V 15493)

Assorted Dinosaur Skulls

Dolichorynchops (USNM PAL 419645)

References

A Game Changer?

The Carnegie Quarry Diaspora

The Discovery

The Mounts

References

In Defense of New Museums

The Gilmore Models: Where are they now?

References

Allan McCollum’s fossil art

A Visit to the Academy of Natural Sciences

What’s Cool

What’s Not So Cool

Recent Comments

Top Posts & Pages

Blogroll

Category Archives: collections

The setting

Dueling quarries

Playing nice

You get a rhino block, and you get a rhino block…

References

Reference

Stegomastodon (USNM 10707)

Paramylodon (USNM V 15164)

Zygorhiza (USNM PAL 537887)

Tapirs, Horses, and Oreodonts

Brachyceratops (USNM 7953)

Corythosaurus (USNM V 15493)

Assorted Dinosaur Skulls

Dolichorynchops (USNM PAL 419645)

References

The Discovery

The Mounts

References

References

What’s Cool

What’s Not So Cool

Recent Comments

Top Posts & Pages

Category Cloud

Blogroll