This display shows a growth series of claws and thigh bones (femora) from the Jurassic dinosaur Allosaurus! This is why we love to have lots of specimens of the same species—we can learn tons about how these bones changed, inside and out!

27 108

The body of today's holocephalans (chimaeras+) are mostly naked, and those few scales they do have are small denticles like those of sharks. Some of their early relatives however, like this Deltoptychius from the Carboniferous, had pretty substantial head-armour

23 42

"Houston...We have a PROBLEM🦖
Happy


[credits: artist unknown]

13 37

Pachyrhinosaurus as suggested by
Happy folks!

5 25

Updated the Tarbosaurus growth series. Happy final hours of to you americans.

39 154

What better way to conclude than to have a pre-flight toast with two of my favorite AMNH artists? They make fossils come to life in ways words cannot. 📸 Leptarctus by Nicole Wong, Sinornithosaurus by Mick Ellison, both

7 32

Submitting my 2nd entry to the exhibition for ! This Archelon Ischyros commissioned by is sdepicted alongside Saurornitholestes, Claosaurus and Ichthyornis.

15 50

We welcome from for her first guest this as we venture into the seeing how life further terrestrialised and why this was the Age of https://t.co/ScM70cWII5

8 11

Some Mosasaurus for And no, we don't know that they had dorsal fins, but we don't know that they didn't either - the right parts of their soft tissues have not, to my knowledge, been preserved to indicate either way.

155 572

This we're loving 😍 the beautiful illustrations of Liassic fossils from Stanford's Geological Atlas of Great Britain, 1904.

48 128

Some classic dinos for this including my childhood fave Triceratops, courtesy of my recent and unexpected trip to I’m guessing all of you know what these all are already ...

7 39

Happy We still don’t know how Radiodonts reproduced, but it probably started (at least in some species) during mass-moulting events, when large numbers of them got together to moult. See fossils of for example. (1/2)

31 115

Some new for my take on Yutyrannus published in entirety for the first time this week. It was created for LTTAII, but that's coming out soon enough to let the covers slip a little on the art. A short thread about this image...

118 461

Australopithecus boisei was so romantic 1.6 million years ago, that its spinal cord exited the skull through a heart-shaped foramen magnum

62 162

Dedicating this to heteromyid rodent CUPIDinimus, named in 1935 from the VALENTINE formation in Nebraska. It was love at first “cite” during my undergrad project. Illustration by N. Wong ; photo of smol snoot by 2005 Jack for

12 30

Nenúfares. An Unenlagiine in its pond. Some old art for this

53 204

Time to briefly revisit Elrhaz Formation with this taqueti model. Original reconstruction of this animal was among the first sauropods ever portrayed with a form of "beak" at the tip of the jaws.

18 63

As it's I took a punt at a Pachyrhinosaur...

(apologies to actual / people, for any horrific amateur mistakes I've blundered into - feel free to correct if I've disgraced current finds in some way, I'll bare in mind for future)

3 5

O is for Oohkotokia. A 74 million year old anklyosaur. The name is in honour of the native Niitsitapi people in North America, who's land it was found on.
(Photo, Paul Penkalski; Art, DevianArt: Ciciopurple)

4 12