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Caleb M. Gordon

@caleb-m-gordon.bsky.social
289 followers 312 following 52 posts

Vertebrate paleobiologist interested in using AI to understand the history of life on Earth. PhD @ Yale, Postdoc @ FLMNH. CalebMGordon.com

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Reposted by Caleb M. Gordon
Gary McGaughey @garyonyx-mcgoy.bsky.social · 08/10/2026
Incredible new species of one of the weirdest clades of Ichthyosauriformes. I had the pleasure of seeing this specimen on display at the Nevada Museum of Art! A pleasant surprise to see it described now along with a review of the clade.
onlinelibrary.wiley.com
Omphalosauridae (Ichthyosauriformes): enigmatic marine reptiles in the global recovery from the end‐Permian extinction
Omphalosauridae are an under-appreciated part of the biotic recovery from the end-Permian Mass Extinction. This clade, including the genera Omphalosaurus, Sclerocormus and Cartorhynchus, is an enigma...
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Thomas R. Holtz, Jr. @arctomet.bsky.social · 10/08/2026
Senate votes to block rule giving White House more control over research | Science | AAAS www.science.org/content/arti...
science.org
Senate votes to block rule giving White House more control over research
Language is part of bill to fund government until mid-December
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Caleb M. Gordon @caleb-m-gordon.bsky.social · 06/08/2026
Thanks for the shoutout, @reptiliferous.bsky.social! So glad to have been part of this awesome project 👁️👁️👁️
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Kelsey Jenkins, PhD @reptiliferous.bsky.social · 05/08/2026
New research out today! Some animals have three eyes?! This eye isn't for "seeing" per se, but it's connected to a part of the brain responsible for regulating body temperature. So if you see a lizard basking out in the sun to get warm, oftentimes this eye plays a central role. But there's more...
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Caleb M. Gordon @caleb-m-gordon.bsky.social · 30/07/2026
Such exciting work! It's awesome to see highly aquatic habits and flippers realized in an ever greater number of Triassic reptile lineages. Congratulations @stephanspiekman.bsky.social and all co-authors!
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Thomas R. Holtz, Jr. @arctomet.bsky.social · 03/07/2026
Napoli, J. G. (2026). Resolving the “ontogeny problem” in vertebrate paleontology. Paleobiology, 1–30. doi:10.1017/pab.2026.10105 www.cambridge.org/core/journal...
cambridge.org
Resolving the “ontogeny problem” in vertebrate paleontology | Paleobiology | Cambridge Core
Resolving the “ontogeny problem” in vertebrate paleontology
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Thomas R. Holtz, Jr. @arctomet.bsky.social · 01/07/2026
Zietlow, A.R., Everhart, M.J. & Polcyn, M.J., 2026. - Redescription of the holotypes of Tylosaurus proriger and Tylosaurus nepaeolicus (Squamata: Mosasauridae) - Deinsea 24: 1 - 21. zenodo.org/records/2041...
zenodo.org
Redescription of the holotypes of Tylosaurus proriger and Tylosaurus nepaeolicus (Squamata: Mosasauridae)
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Caleb M. Gordon @caleb-m-gordon.bsky.social · 14/06/2026
I had no idea baby jellyfish were so cute! 🪼
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The New York Times @nytimes.com · 14/06/2026
From @theathletic.com: The New York Knicks are NBA champions for the first time since 1973 and for just the third time in team history. They stunned the San Antonio Spurs, again, with another comeback win in Game 5 of the finals. www.nytimes.com/athletic/735...
Karl-Anthony Towns hugs Mitchell Robinson after the New York Knicks defeated the San Antonio Spurs in Game 5 of the NBA finals. A headline reads: "Knicks Defeat Spurs to Win First NBA Title in 53 Years." Photo by
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Caleb M. Gordon @caleb-m-gordon.bsky.social · 14/06/2026
static.klipy.com
New York Knicks Larry Johnson Chant
ALT: New York Knicks Larry Johnson Chant
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Caleb M. Gordon @caleb-m-gordon.bsky.social · 13/06/2026
Many thanks to @phys.org.web.brid.gy and the Yale Peabody Museum for featuring our research! peabody.yale.edu/news/fossil-...; phys.org/news/2026-06...
peabody.yale.edu
Fossil discovery shows the interaction between giant marine reptiles | Yale Peabody Museum
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Joshua J. Friedman @joshuajfriedman.com · 02/06/2026
Today is election day in California, Iowa, New Mexico, Montana, South Dakota, and New Jersey! Want to keep up with the coverage? Follow these politics reporters and elections experts for the very latest
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Chanda Prescod-Weinstein 🌌 @chanda.blacksky.app · 29/05/2026
NEW: A lot of bad has happened to American science over the last year but nothing comes even close to what’s about to happen if we don’t speak out in opposition to the OMB rule changes and I hope @aaas-socsci.bsky.social @apsphysics.bsky.social and others will launch public campaigns about this. 🧪🔭⚛️
news.chanda.science
It's the End of American Science As We Know It
We have 45 days to express our opposition to catastrophic changes.
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Caleb M. Gordon @caleb-m-gordon.bsky.social · 29/05/2026
Such exciting work! Huge congrats @semifossorial.bsky.social! I was also happy to see Sauropterygia recovered on the archosaur stem :)
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Xavier A. Jenkins @semifossorial.bsky.social · 28/05/2026
Our paper on turtle origins is finally out in Current Biology, with two major implications for our understanding of reptile evolution 🐢 #Paleontology #Turtles #Evolution www.cell.com/current-biol...
A pair of Eunotosaurus by Gabriel Ugueto: a sense of scale is provided by Glossopterus leaves in the fore-and-background and by a prosbolid hemipteran insect Phylogeny of major reptile groups, showing turtles (Pantestudines) as early archosauromorphs and the putative stem-turtle Eunotosaurus as a millerettid stem reptile
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Florida Museum of Natural History @floridamuseum.bsky.social · 28/05/2026
The Turtle Death Layer coughed up a fossil with teeth marks, revealing a conflict between turtle and gar! 🐢 Paleontologist Jason Bourque recently described a new, extinct species of musk turtle that lived in Florida during the late Miocene. Story: www.floridamuseum.ufl.edu/science/anci...
A man wearing a museum baseball cap and a short-sleeved shirt examines a fossil using a binocular microscope. A name tag on his shirt reads “Jason Bourque, Paleontologist.” He is seated at a workbench with fossils and tools visible in the background.Close-up of a fossil turtle shell. The shell's surface features a network of polygonal scutes, exhibiting a cracked and textured appearance indicative of its age and fossilization. The shell is a warm brown tone against a black background, emphasizing its detailed surface patterns.Close-up of a preserved alligator gar skull. The skull is light-colored and weathered, with visible teeth lining both jaws. Many sharp, pointed teeth are present, especially in the lower jaw, creating a textured appearance. The skull rests on a light surface.
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Caleb M. Gordon @caleb-m-gordon.bsky.social · 27/05/2026
Depends on how, and by how much
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Paleo Nerds Podcast @paleonerdspod.bsky.social · 25/05/2026
Hey, we're a bit SLOW on wishing you a happy #WorldTurtleDay 🐢! Stupendemys was the LARGEST TURTLE OF ALL TIME! Researchers estimated the weight of the turtle to be 2,500 lbs. or the weight of as much as a Honda Civic or Toyota Corolla 🚘 = 🐢!
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Science Friday @scifri.bsky.social · 24/05/2026
Want to learn or teach about 290-million-year-old vomit? Check out our educational resource! We break down how scientists study regurgitalites to find out what prehistoric creatures ate. Plus our free worksheet helps kids to think big about fossilized vomit. bit.ly/3RYVo0B
sciencefriday.com
Can fossilized vomit tell you what prehistoric animals ate?
Learn how paleontologists study fossilized vomit to explore what prehistoric predators ate.
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Caleb M. Gordon @caleb-m-gordon.bsky.social · 24/05/2026
This is wild! Do you know what species? I thought the fisherman bat (Noctilio leporinus) was the only one known to regularly swim.
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Caleb M. Gordon @caleb-m-gordon.bsky.social · 24/05/2026
Amazing :)
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American Museum of Natural History @amnh.org · 21/05/2026
🚨 There’s a new T. rex in town! A newly described species of giant mosasaur—growing up to 43 ft long—has been named Tylosaurus rex, or “king of the tylosaurs.” One of the largest mosasaurs known to date, this T. rex might be every bit as fearsome as the original “tyrant king.” Read more.👇
bit.ly
Giant Mosasaur Species from Texas Named T. rex | AMNH
New research describes Tylosaurus rex from more than a dozen previously known fossils.
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Caleb M. Gordon @caleb-m-gordon.bsky.social · 18/05/2026
I’m glad you asked! In this case, we can’t be sure of either option. That said, the high-impact nature of the interaction (which caused the predator to break and lodge a tooth in its prey), and taphonomic evidence for rapid burial of the vertebra, lead us to suspect predation over scavenging.
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Caleb M. Gordon @caleb-m-gordon.bsky.social · 16/05/2026
It’s an open database of species silhouettes, developed by @tmkeesey.bsky.social. I use it all the time for making annotated phylogenies and other scientific figures. Anyway, your illustrations would be great for it! www.phylopic.org
phylopic.org
PhyloPic
PhyloPic is an open database of free silhouette images of animals, plants, and other life forms, available for reuse under Creative Commons licenses. Download silhouettes for use in educational materi...
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Caleb M. Gordon @caleb-m-gordon.bsky.social · 16/05/2026
These are awesome! Will you be adding them to PhyloPic?
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Caleb M. Gordon @caleb-m-gordon.bsky.social · 16/05/2026
Cool paper! I took Patrick Greenough’s conceptual engineering class at St. Andrews ~10 years ago now. Such a fascinating set of topics
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The New York Times @nytimes.com · 15/05/2026
Archaeologists in Egypt have discovered a 2,000-year-old mummy with a papyrus fragment of the “Iliad” sealed in a clay packet outside its wrappings. It is the first time a literary work has been found playing a functional, spiritual role in the mummification process.
nyti.ms
Archaeologists Find Egyptian Mummy Buried With the ‘Iliad’
For the deceased of Roman-era Egypt, Greek literature may have offered a cheat code to a more comfortable afterlife.
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feikosaur.bsky.social @feikosaur.bsky.social · 08/05/2026
Good news for all Jurassic ichthyosaur lovers! fr.pensoft.net/articles.php... In this paper we did 3 things: 1) assess a specimen of UK Stenopterygius, 2) Find new metrics to differentiate the Stenop species 3) ammend some taxonomy (no more Magnipterygius). Congrats to Timothee on his first paper!
fr.pensoft.net
A well-preserved specimen of Stenopterygius quadriscissus (Reptilia, Ichthyosauria) from the Early Jurassic (Toarcian) of Yorkshire, UK and new insights into species delineation in the genus
Despite abundant and productive Toarcian ichthyosaur-bearing localities in continental Europe, in the UK, Toarcian ichthyosaurs may often be fragmentary and/or too poorly preserved for positive identi...
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Caleb M. Gordon @caleb-m-gordon.bsky.social · 01/05/2026
Last week, @science.org revealed 𝘕𝘢𝘯𝘢𝘪𝘮𝘰𝘵𝘦𝘶𝘵𝘩𝘪𝘴, a giant predatory octopus from the Cretaceous 🐙 This discovery reminds us how even a single lump of rock can totally change our perspective on the history of the world. ⁣Read more about the new sea monster here: www.science.org/doi/10.1126/...
science.org
Earliest octopuses were giant top predators in Cretaceous oceans
Top predators drive changes in ecosystem structure. For the last ~370 million years, large-sized vertebrates have dominated the apex of the marine food chain, while invertebrates have served as smalle...
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Caleb M. Gordon @caleb-m-gordon.bsky.social · 30/04/2026
Wow, incredible shot!
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Carl Zimmer @carlzimmer.com · 27/04/2026
Trump Fires Board Members of Group That Oversees U.S. Science Funding. Gift link: nyti.ms/4u7I3kr
nyti.ms
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Caleb M. Gordon @caleb-m-gordon.bsky.social · 26/04/2026
Thanks for sharing, @arctomet.bsky.social! :)
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Alt National Park Service @altnps.bsky.social · 25/04/2026
Trump fired all 24 members of the National Science Board, the body that oversees the National Science Foundation. The letters read, “On behalf of President Donald J. Trump, I’m writing to inform you that your position as a member of the National Science Board is terminated, effective immediately.”
science.org
Trump fires NSF's oversight board
Dismissal of the National Science Board is widely seen as latest move to erase NSF’s independence
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Caleb M. Gordon @caleb-m-gordon.bsky.social · 26/04/2026
Thanks Feiko! Much appreciated :)
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Caleb M. Gordon @caleb-m-gordon.bsky.social · 25/04/2026
𝐘𝐨𝐮 𝐤𝐧𝐨𝐰 𝐡𝐨𝐰 𝐩𝐥𝐢𝐨𝐬𝐚𝐮𝐫𝐬 𝐚𝐭𝐞 𝐢𝐜𝐡𝐭𝐡𝐲𝐨𝐬𝐚𝐮𝐫𝐬? Well, we’ve always assumed they did (and for good reason), but there’s been surprisingly little direct evidence to support this assumption. In a new paper, we describe an unassuming little Jurassic fossil that directly confirms it: doi.org/10.3374/014....
media.tenor.com
a whale is swimming in the ocean and has white spots on its back
ALT: a whale is swimming in the ocean and has white spots on its back
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Caleb M. Gordon @caleb-m-gordon.bsky.social · 25/04/2026
@liamtaylor.bsky.social this is hilarious 😂
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Marcos K. Pinheiro / "Marcos Wyvern" (Marcosaurus) @mmarcosaurus.bsky.social · 16/04/2026
www.iflscience.com/murder-muppe...
iflscience.com
“Murder Muppet” Dinosaur From Triassic Period Discovered Through Efforts Of First-Year Student
Though described as “uniquely sucky,” this fossil has overturned thinking on a murky period in prehistory – and you can even stick your finger in its brain.
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Marcos K. Pinheiro / "Marcos Wyvern" (Marcosaurus) @mmarcosaurus.bsky.social · 16/04/2026
www.discovermagazine.com/a-uniquely-s...
discovermagazine.com
A “Uniquely Sucky Specimen,” This Smashed 205-Million-Year-Old Skull Demonstrates Early Dinosaur Diversity
Learn more about the “folded” fossil of Ptychotherates bucculentus, from one of the first families of carnivorous dinosaurs.
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Caleb M. Gordon @caleb-m-gordon.bsky.social · 03/04/2026
So glad to have been interviewed for this story! I stand by it ⚰️🔨 See the article below and the original paper by Ned Snelling and colleagues for more info on the increasingly dubious connection between high oxygen and griffenfly size 😎
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The Anatomical Record @anatrecord.bsky.social · 06/03/2026
🦖 Free Webinar: 200 Years of Vertebrate Paleontology in South Asia Join Dr. Advait Jukar for a fascinating look at the history and future of vertebrate paleontology in South Asia. 📅 March 11 | 12-1 PM ET 🔗 Register: anatomy.org/ANATOMY/Meet...
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Mark Lemley @marklemley.bsky.social · 09/01/2026
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Marcos K. Pinheiro / "Marcos Wyvern" (Marcosaurus) @mmarcosaurus.bsky.social · 09/01/2026
www.princeton.edu/news/2026/01...
princeton.edu
Princeton paleontologist: Yes, tiny tyrannosaurs lived alongside T. rex
By cutting into a tiny dinosaur throat bone, Princeton's Chris Griffin showed that it belonged to an adult of a smaller tyrannosauroid cousin, not a juvenile T. rex.
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Griffin Lab @griffinlabpaleo.bsky.social · 04/12/2025
Very excited to share that our latest paper is out in Science! We show that the type specimen of Nanotyrannus—an isolated skull—is fully grown, showing that it is not a juvenile Tyrannosaurus rex but a distinct species (1/12) www.science.org/doi/10.1126/...
science.org
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Steve Brusatte @stevebrusatte.bsky.social · 04/12/2025
Score more evidence for Nanotyrannus being a legit species of small tyrannosaur and not a juvenile T. rex: Mature histology in, of all bones, the hyoid. Of the holotype Cleveland skull! Truly innovative work by @griffinlabpaleo.bsky.social & team. www.science.org/doi/10.1126/...
science.org
A diminutive tyrannosaur lived alongside Tyrannosaurus rex
Whether Nanotyrannus lancensis represents a distinct taxon or an immature Tyrannosaurus rex is a decades-long controversy. The N. lancesis holotype is an isolated skull and ceratobranchials, but limb ...
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Caleb M. Gordon @caleb-m-gordon.bsky.social · 01/12/2025
@iflscience.com! Many thanks for featuring our research!
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IFLScience @iflscience.com · 26/11/2025
Some crawled out of the ocean and then several million years later, crawled right back in. www.iflscience.com/when-did-som...
iflscience.com
When Did Some Ancient Extinct Species Return To The Sea? Machine Learning Helps Find The Answer
Some crawled out of the ocean and then several million years later, crawled right back in.
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Caleb M. Gordon @caleb-m-gordon.bsky.social · 28/11/2025
Many thanks to Dr. Silvia Pineda-Munoz at @climateages.bsky.social for covering our research! Check out her great article on our Spinosaurus results here: climateages.com/how-aquatic-... Or dive into the original paper below! doi.org/10.1016/j.cu...
climateages.com
How Aquatic Was Spinosaurus, Really? - Climate Ages
Image made with CANVA with Artwork by PaleoGeekSquared Image made with CANVA with Artwork by PaleoGeekSquared From museum drawers to machine learning, scientists reveal a...
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The Ramsey Lab @theramseylab.bsky.social · 27/11/2025
The surprising crab-trap–pulling behavior is described in this article: onlinelibrary.wiley.com/doi/10.1002/... We recently published a paper on how animal tool use is conceptualized, offering a framework to make sense of its different forms 👇📃 www.cambridge.org/core/journal... #evosky #philsci
cambridge.org
Tool Use Beyond Humans | Philosophy of Science | Cambridge Core
Tool Use Beyond Humans - Volume 92 Issue 4
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Alberta Claw @albertonykus.bsky.social · 27/11/2025
Dinosaurs were nearly wiped out 66 million years ago, long before the start of the Quaternary ice age. However, #PrehistoricPlanetIceAge shows that the few surviving dinosaurs (birds) would go on to become highly successful. Let's meet the ice age dinosaurs featured in the series! 🪶🧪
Screenshot from Prehistoric Planet: Ice Age showing the head and neck of a giant stork.Screenshot from Prehistoric Planet: Ice Age showing a long-legged bird standing on a rock. It is using one foot to hold down a piece of meat while also tearing at it with its beak.Screenshot from Prehistoric Planet: Ice Age showing two flightless birds with long necks standing in a forest. The male on the left has a bright blue head and is much smaller than the female on the right.Screenshot from Prehistoric Planet: Ice Age showing numerous large flightless birds feeding in a wetland.
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Caleb M. Gordon @caleb-m-gordon.bsky.social · 21/11/2025
Thanks so much, @armanafzadeh.bsky.social! Your feedback throughout was greatly appreciated :)
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