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T.K. Sivgin

@manospondylus.bsky.social

130 followers 120 following 180 posts

Science-history writer, creator of the Manospondylus blog and the Har Deshur spec-evo project

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T.K. Sivgin @manospondylus.bsky.social · 3d

youtu.be/Bn_kXKlSX5o?...

Nanotyrannus did it

YouTube video by Manospondylus

youtu.be

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T.K. Sivgin @manospondylus.bsky.social · 3d

youtu.be/Bn_kXKlSX5o?...

Nanotyrannus did it

YouTube video by Manospondylus

youtu.be

T.K. Sivgin @manospondylus.bsky.social · 16d

@bestcryptids.bsky.social This one is real, right?

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T.K. Sivgin @manospondylus.bsky.social · Sep 2

Is that a brontothere ceratopsian?

Reposted by T.K. Sivgin

Entomemeology @entomemeology.bsky.social · Aug 31

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T.K. Sivgin @manospondylus.bsky.social · Aug 26

Wow! Makes me want to see more mythological art from you.

I bet this is for the chapter about the elephant-skull hypothesis

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T.K. Sivgin @manospondylus.bsky.social · Aug 26

Makes me wonder if Elon Musk was involved

T.K. Sivgin @manospondylus.bsky.social · Aug 23

This image has big shitpost energy

T.K. Sivgin @manospondylus.bsky.social · Aug 22

I find it weird that Greg Paul isn’t cited anywhere in this paper. He’s the first one that comes to my mind any time a paravian group is proposed to be neoflightless avialans.

T.K. Sivgin @manospondylus.bsky.social · Aug 22

So there is this new paper which shows that unenlagiids were actually secondarily flightless #avialans. Which is cool and all, though what confuses me is that Greg Paul isn’t cited anywhere in it, despite him being the first and strongest supporter of this idea: www.tandfonline.com/doi/full/10....

Phylogenetic relationships of Unenlagiidae among Paraves (Dinosauria)

In recent years, several studies on the osteology, myology and palaeobiology of southern paravians of the clade Unenlagiidae have considerably increased the information on the group. Nevertheless, ...

www.tandfonline.com

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T.K. Sivgin @manospondylus.bsky.social · Aug 14

Cool!

T.K. Sivgin @manospondylus.bsky.social · Aug 14

Is this based on that one real life enantiornithean theorized to have had an extendable tongue? I forgot its name.

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T.K. Sivgin @manospondylus.bsky.social · Aug 9

Part 3: www.manospondylus.com/2025/08/wilf...

T.K. Sivgin @manospondylus.bsky.social · Aug 9

Part 2: www.manospondylus.com/2025/08/wilf...

A lone Tyrannosaurus standing in the surf of the retreating tide

T.K. Sivgin @manospondylus.bsky.social · Aug 9

Martin Wilfarth was a German researcher who in the 1940s claimed that Mesozoic Earth was experiencing super tides and that all dinosaurs were actually semi-marine animals. In a 3-part series I try to explore the how and why of his reasoning: www.manospondylus.com/2025/08/wilf...

The armored dinosaur Kentrosaurus, reconstructed as a shallow-water-dweller, using its thagomizer to anchor itself in the sand as it stands up to breathe

Iguanodon, reconstructed as an aquatic animal

Corythosaurus, reconstructed with a fleshy breathing-proboscis extending from its headcrest

Diplodocus, reconstructed as an ocean-bottom dweller “grazing” on marine worms

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T.K. Sivgin @manospondylus.bsky.social · Jul 25

All the #fossils I collected in Donkey Kong Bananza

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T.K. Sivgin @manospondylus.bsky.social · Jul 24

Just finished the game and they absolutely nailed it. They made some pretty awesome remixes of your tracks.

T.K. Sivgin @manospondylus.bsky.social · Jul 23

So were these structures “solid” to the touch like leaves or actually fuzzy like feathers?

T.K. Sivgin @manospondylus.bsky.social · Jul 23

Do you think this means other drepanosaurs (like Megalancosaurus and Hypuronector) could have also had these “feather-scales”?

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T.K. Sivgin @manospondylus.bsky.social · Jul 12

A teaser for a blogpost I am working on. Between the 1930s and 50s, German paleontologist Martin Wilfarth proposed that the headcrests on #hadrosaurs were actually attachment-points for snorkel-trunks. This was part of his wider ides that all #dinosaurs were tidal animals.

Speculative reconstruction of the dinosaur Corythosaurus with a fleshy trunk extending from its bony headcrest, used as a snorkel while the animal is submerged in water.

T.K. Sivgin @manospondylus.bsky.social · Jul 3

I think it’s beautiful

T.K. Sivgin @manospondylus.bsky.social · Jun 29

A compilation of videos I did with @cmkosemen.bsky.social discussing the #SilurianHypothesis: youtu.be/6ciSxFuDXCc?...

Silurian Hypothesis MEGACOMPILATION 2 (feat. C. M. Kosemen)

YouTube video by Manospondylus

youtu.be