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Tyler Greenfield Profile
Tyler Greenfield

@TylerGreenfieId

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Paleontologist. Science writer. Studies sharks, dinosaurs, cephalopods, paleoart, taxonomy, and cryptozoology.

Joined June 2017
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@TylerGreenfieId
Tyler Greenfield
2 years
A living toad 325 feet deep at the bottom of Loch Ness.
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Tyler Greenfield
3 years
The council will decide your fate...
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Tyler Greenfield
1 year
Captive goblin shark inside a compression tank, in Japan in 2007.
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Tyler Greenfield
2 years
This sighting occurred in 2005, so unfortunately this particular toad has probably died.
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Tyler Greenfield
2 years
Has anyone ever proposed that Nessie is a giant frog? I know there are giant salamander theorists out there, so there could be giant frog theorists.
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@TylerGreenfieId
Tyler Greenfield
3 months
We have a new contender for the worst megalodon reconstruction of all time. This looks like a joke, but it was made 100% seriously.
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Tyler Greenfield
3 years
Ok one more furry skeleton meme
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Tyler Greenfield
2 years
I never said that.
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Tyler Greenfield
1 year
3 new species of nautiluses were just named! These are photos of the new species, N. samoaensis (A & B), N. vanuatuensis (C), and N. vitiensis (D).
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Tyler Greenfield
3 years
The full description of the skin impressions from Carnotaurus has finally been published!
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Tyler Greenfield
3 years
Please stop retweeting and liking this false factoid that keeps going around. The Greenland shark whose age was estimated (392±120 years, so 272-512 years) was captured and euthanized sometime between 2010-2013 and this is not even a photo of the same individual.
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Tyler Greenfield
4 years
Basking shark ontogeny needs a lot more study. Of particular interest to me is the beak-like snout shape in really young individuals, which so far has only been documented in a single paper. This is a juvenile caught in Japan in 1977. .
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@TylerGreenfieId
Tyler Greenfield
1 year
The theropod lip paper is out and the conclusion is lizard-like lips!
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Tyler Greenfield
2 years
Look at this amazing Thescelosaurus leg from the Tanis site!
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Tyler Greenfield
2 years
The tragedy of Monolophosaurus
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Tyler Greenfield
3 years
Never would I have thought that the dodos from Ice Age would be featured in a scientific paper, yet here we are.
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@TylerGreenfieId
Tyler Greenfield
2 years
I'm a huge fan of Gurney's work, but the giant sawfish Onchopristis for the new Spinosaurus paper makes me very sad. 😔
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Tyler Greenfield
3 years
It still blows my mind that cephalopod eyes were evolved completely independent of vertebrate eyes.
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@TylerGreenfieId
Tyler Greenfield
1 year
Watch this dwarf reed snake using "cartwheels" to escape, filmed for the first time ever.
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Tyler Greenfield
3 years
POV: you are about to face the final boss of paleontology.
@Philoceratops
Loricata
3 years
@DEGL_TOONS take this beautiful image of Khishigjav Tsogtbaatar
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Tyler Greenfield
2 years
Another thing I’m curious about: is this the deepest underwater record of an amphibian (not counting caves)?
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Tyler Greenfield
2 years
These are photographs of a Tarbosaurus mummy discovered in 1991. It had skin impressions covering the dorsal side of the tail and hips, probably the most extensive of any tyrannosaurid ever discovered.
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Tyler Greenfield
2 years
Yes, this really happened.
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Tyler Greenfield
1 year
Peters now thinks Homotherium is a sabertooth dog! 🤦‍♂️
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Tyler Greenfield
3 years
The four dinosaurs of the apocalypse
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Tyler Greenfield
1 year
Thinking about the adult great white (14.5 feet long) that was found with 150 crabs in its stomach. Sometimes macropredators are weird and eat much smaller prey.
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@Evoincarnate
EWA WAHINE’ONIUHINUI (she/they) 🦈
1 year
The funniest thing I’ve ever seen The largest population of great whites eat mostly fish that aren’t that big
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Tyler Greenfield
3 years
Big Al enjoys a good "yeehaw" every now and then
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Tyler Greenfield
11 months
It's so funny that the closest relatives of colossal squids are cute little things like piglet squids.
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@CephalopodToday
Cephalopods Daily
11 months
The giant squid (Architeuthis dux) and the colossal squid (Mesonychoteuthis hamiltoni) are two BIG squids. The giant squid is the longest squid and the colossal squid is the biggest. You'd think they'd be closely related, but taxonomists have them in different superfamilies!
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Tyler Greenfield
3 years
Newly described trace fossils from New Mexico possibly show a tyrannosaur rising from a resting position on its forearms. This would disprove the old notion that if they fell they couldn't have gotten back up.
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Tyler Greenfield
1 year
This is pretty cool, but actually not the first time it’s been documented. A sperm whale with a giant squid in its mouth was photographed near Japan in 2009.
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@pedosirenpd
Pedosiren
1 year
Found this on IG, from ecowatch.discovery.mauritius
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Tyler Greenfield
4 years
Other artists: Why don’t you ever draw dinosaurs from the front? Paleoartists:
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Tyler Greenfield
1 year
I love animals preserved in bizarre ways, so here's the mold of a griffon vulture's head in volcanic ash.
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@Trey_Explainer
Trey the Explainer
1 year
Mummified dog stuck in a tree for 20 years
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Tyler Greenfield
2 years
🤨
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Tyler Greenfield
3 years
For people wondering what this actually is, it's probably a common torpedo ray.
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@CSMFHT
Classical Studies Memes for Hellenistic Teens
3 years
Is this from Star Wars??
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Tyler Greenfield
2 years
AI creates more convincing Bigfoot photos than most of the “real” ones.
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Tyler Greenfield
2 years
The fact that actor David Schwimmer played a paleontologist and that there is also a real paleontologist named David Schwimmer will always be funny.
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Tyler Greenfield
2 years
I somewhat doubt this interpretation, but the idea that great whites can express frustration is incredibly funny.
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Tyler Greenfield
2 years
Bioluminescent ammonites in Prehistoric Planet! 😍
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Tyler Greenfield
2 years
Photographs and reconstruction of the first complete body fossils of Cretalamna sp.
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Tyler Greenfield
3 years
New paper on an ammonite with preserved soft tissues, Subplanites sp. from the Late Jurassic of Germany, including what is possibly the first preserved siphon!
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Tyler Greenfield
2 years
This might be the worst "megalodon" I've ever seen.
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Tyler Greenfield
3 years
Wow this paper really used dinosaur toys to estimate volume/mass and called them "scientifically accurate palaeoreconstructions".
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Tyler Greenfield
2 years
I’ve seen a few people suggesting that Prehistoric Planet’s swimming T. rex “copied” various pieces of paleoart. Newsflash: it’s a basic and common animal behavior that no artist “owns”.
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Tyler Greenfield
10 months
Hippos are not analogues for the facial soft tissues of Andrewsarchus. Their skulls are completely different from one another.
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@Cyclopes_sp
Cyclopes
10 months
Iam so deeply in love with the Path of Titans Andrewsarchus
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Tyler Greenfield
3 years
Reminder that the fuzzy nautilus exists and it is amazing.
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Tyler Greenfield
8 months
I am thrilled to announce that my paper reexamining the 'modern survival' of Otodus megalodon has finally been published!
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Tyler Greenfield
1 year
New images of Xiphactinus and ammonites from Prehistoric Planet 2.
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Tyler Greenfield
4 years
I still can't get over this Eocene frog.
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Tyler Greenfield
3 years
Therapist: Bipedal baby Triceratops aren’t real, they can’t hurt you. Bipedal baby Triceratops:
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@TylerGreenfieId
Tyler Greenfield
3 years
Caught in the headlights
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Tyler Greenfield
3 years
I like Jaws as much as the next person, but one quote in particular has always bothered me. Quint says that sharks have "lifeless eyes, black eyes, like a doll's eyes", but that just isn't true. Great whites have very pretty dark brown eyes with blue irises.
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Tyler Greenfield
3 years
This is the new filter-feeding lamniform shark Aquilolamna from the Late Cretaceous of Mexico. Words cannot even begin to describe how weird this thing is.
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Tyler Greenfield
2 years
A Cretaceous filter feeding shark from Canada has been unveiled by the Canadian Fossil Discovery Centre (art by @JCsotonyi )! There aren't many details available yet, but I wonder if it is a johnlongiine?
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Tyler Greenfield
2 years
One of the earliest life reconstructions of O. megalodon, drawn by Othenio Abel in 1916. We've come a long way since then.
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Tyler Greenfield
1 year
New paper proposes that T. rex was a shallow water runner. Yes, really. 🤦‍♂️
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Tyler Greenfield
2 months
This happens all the time
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@Mhuyo
Mhuyo - DOKOMI
2 months
Here's the template, use responsibly.
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Tyler Greenfield
3 years
Another fun fact: zebrafish are more closely related to zebras than they are to zebra sharks.
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@ZebrafishRock
Zebrafish Rock!
3 years
Did you know? Zebrafish are more closely related to fish than to zebras. #ZebrafishFunFacts
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Tyler Greenfield
3 years
Pain
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Tyler Greenfield
1 year
I love the dioramas in Denver (haven't been to Milwaukee or AMNH yet), but I feel like the ones at the Ancient Ozarks Museum are also up there.
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@Bhmllr
Ben Miller 🦕🏛🦎
1 year
Sorry AMNH, the best dioramas in the world are in Milwaukee and Denver.
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Tyler Greenfield
1 year
You don’t have to have a degree in biology or paleontology to spread misinformation. The Spinosaurus neotype is a single individual and the legs were found associated with the vertebrae, so their proportions are known.
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@AGamingBeaver
TheGamingBeaver
1 year
You don't have to have a degree in biology or paleontology to know that these legs ain't it.
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Tyler Greenfield
1 year
Someone should look at Ceratosaurus again and see if it could flex its mandibles like Bakker proposed.
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Tyler Greenfield
9 months
The birds in this neck of the woods aren't quite right...
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Tyler Greenfield
1 year
And yet, despite being a relatively rare shark, 273 occurrences have been documented to date! Although some use the megamouth as support for living megalodon, it's actually strong evidence against the idea.
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@HodariNundu
Hodari Shadowalker ❄️🐆
1 year
On the other hand we DO have a very large, very weird, very ancient Meg shark that does still exist- Megachasma pelagios aka Megamouth shark, so rare to see it's almost a cryptid and said to possibly grow to 7 m or so! This meg deserves more attention!
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Tyler Greenfield
3 years
The deep sea art of Else Bostelmann deserves to be more widely recognized.
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Tyler Greenfield
3 years
So it turns out that basking sharks, porbeagles/salmon sharks, makos, and great whites all have "pockets" for their claspers to reduce drag.
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Tyler Greenfield
2 years
New paper confirms that Vampyronassa from the Middle Jurassic of France is an early vampire squid!
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Tyler Greenfield
4 years
Speeding up David Peters' gifs 500x makes them so much better.
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Tyler Greenfield
3 years
It never ceases to amaze me that moray eels have an extra set of jaws in their throats.
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Tyler Greenfield
1 year
The "giant orthocone"/"Cameroceras" in Chased by Sea Monsters was probably based on a lost, supposedly huge specimen of Endoceras. The largest confirmed specimen is significantly smaller.
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Tyler Greenfield
2 years
They named a new species of giant salamander back in May?! Somehow this paper slipped under the radar, I don't remember seeing any news articles about it.
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Tyler Greenfield
3 years
3,000 year-old skeleton of a shark attack victim found in Japan! The most likely culprits were a great white or tiger shark.
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Tyler Greenfield
3 years
Alioramus gulping down its prey is one of my favorite paleoart memes.
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Tyler Greenfield
1 year
A diagram of the eye of the great white shark.
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Tyler Greenfield
2 months
Xi Jinping gifted Emmanuel Macron with a model of an Anchiornis at their recent meeting. Is this the first time a non-avian dinosaur has been shared between presidents?
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Tyler Greenfield
1 year
Cassowaries are another example of this. Their quill-like wing feathers are modified pennaceous feathers that don't attach to the ulna and lack quill knobs.
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@Paleoartologist
Hank Sharpe
1 year
Quill knobs! When present, they indicate large wing feathers. BUT, some birds (ostriches, rheas, ducks) have large wing feathers without quill knobs, so their absence doesn’t mean dinosaurs without them were wingless #FossilFriday
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Tyler Greenfield
3 months
Instead of doing a prank for April Fool's this year, I'll ask what is your favorite paleontological, zoological, or cryptozoological hoax/fake? I think “Randy” the “Majungasaurus” is still my favorite.
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Tyler Greenfield
3 years
I made this tier list of deep sea creatures, cryptids, strange encounters, and conspiracy theories. See how many you can recognize; are you a fresh-faced twilight zoner or an experienced hadal zoner?
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Tyler Greenfield
2 years
Lystrosaurus mummies!!!
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Tyler Greenfield
2 years
What are some of your favorite fringe hypotheses in paleontology? One of mine is the idea that Carboniferous coal was formed from floating forests and not swamps.
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Tyler Greenfield
2 years
Neanderthal models are great
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Tyler Greenfield
3 years
When you study Paleozoic animals
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Tyler Greenfield
2 years
An amazing, nearly-complete skeleton of the Oligocene sand tiger Carcharias cuspidatus described by Hovestadt (2022). It even has nine embryos preserved inside it!
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Tyler Greenfield
10 months
Chased by Sea Monsters from 20 years ago had a more accurate endocerid model. 😬
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@netflix
Netflix
10 months
To understand life we must go back to the beginning. Life on Our Planet — from executive producer Steven Spielberg and the team behind Our Planet — premieres October 25.
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Tyler Greenfield
2 years
Yeah the "wolves" in Rings of Power were definitely inspired by entelodonts. They even have the bony knobs on the lower jaw.
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Tyler Greenfield
2 months
You may have seen this thread claiming that the osteoderms of Ceratosaurus were internal mineral deposits. Just know that this interpretation is completely unsupported and the author is blocking people pointing this out in the replies.
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Tyler Greenfield
2 years
In 1972 off the coast of South America, an unidentified animal attacked the sonar dome of the Navy frigate USS Stein. It shredded the rubber coating and left behind many hooks embedded in it.
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Tyler Greenfield
3 years
This is one of the oldest depictions of a thresher shark (probably Alopias vulpinus) from a 1569 English pamphlet.
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Tyler Greenfield
2 years
Watching paleontology drama unfold on multiple fronts
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Tyler Greenfield
4 years
How is this a real news article? There is so much wrong, I don't even know where to start.
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Tyler Greenfield
3 years
Broke: Dinosaur lip debate Woke: Dunkleosteus lip debate
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Tyler Greenfield
2 years
No, The Rock did not buy the real Stan. The skull behind him is a replica. Replicas of Stan are the most widely-sold of any T. rex.
@SInow
Sports Illustrated
2 years
The Rock has a massive T-Rex skull in his house: "It's pretty badass isn't it" 😂
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Tyler Greenfield
2 years
A very scientific recreation of this event:
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@RoyalTyrrell
Royal Tyrrell Museum of Palaeontology
2 years
Palaeopathologies like disease and injuries are prevalent in fossil bones. Did you know that they are also identifiable in trace fossils? This fossil footprint from Nose Mountain, Alberta shows evidence of a large theropod that had a severely dislocated toe!
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Tyler Greenfield
2 years
Big tyrannosaur integument news tomorrow...
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Tyler Greenfield
1 year
Nobody: Peters:
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Tyler Greenfield
2 years
Interesting that this recent paper reconstructed Panthera spelaea with stripes. The evidence for this idea is laughably weak, it's based on over-interpretation of very ambiguous art.
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Tyler Greenfield
3 years
A glorious vintage Spinosaurus skeletal from 1982
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Tyler Greenfield
3 years
The new ctenacanth Dracopristis hoffmanorum (formerly informally known as the "Manzano ctenacanth" and "Godzilla shark") is pretty awesome! Check out that beautifully preserved complete skeleton.
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