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David Clark

@clarkeocrinus.bsky.social

I'd rather be crinoid hunting. Invertebrate enthusiast, Paleo artist, Fossil prep, President of Friends of the University of Michigan Museum of Paleontology

5,061 Followers  |  308 Following  |  1,983 Posts  |  Joined: 31.07.2023
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Posts by David Clark (@clarkeocrinus.bsky.social)

If an official commits an impeachable offense and nobody acts to impeach, it is no longer an impeachable offense.

People who oppose impeachment as β€œpointless” because it seems unlikely to result in removal do not understand this very simple point and seem unwilling to even try to understand it.

09.03.2026 12:36 β€” πŸ‘ 6725    πŸ” 1993    πŸ’¬ 88    πŸ“Œ 69

Don't forget to take a breath when you're gargling orange balls, Mike.

09.03.2026 21:57 β€” πŸ‘ 2    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

JFC

War crimes and rapists.

09.03.2026 21:56 β€” πŸ‘ 8    πŸ” 1    πŸ’¬ 0    πŸ“Œ 0

Americans have no idea how much the world is shook, folks. Here in Thailand they have a running tally of how many days' worth of fuel the country has left.

09.03.2026 02:51 β€” πŸ‘ 3041    πŸ” 811    πŸ’¬ 42    πŸ“Œ 40
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Attacks leave dead vs killed

09.03.2026 03:21 β€” πŸ‘ 10018    πŸ” 2623    πŸ’¬ 141    πŸ“Œ 122

This godforsaken idiot piece of shit.

09.03.2026 10:10 β€” πŸ‘ 941    πŸ” 244    πŸ’¬ 39    πŸ“Œ 3

Al Jazeera cracked this "enigma":

This school had many daughters of military officers and soldiers. The idea was to attract them to the school, strike it to draw in rescuers and relatives, and then strike it again to kill them.

08.03.2026 12:30 β€” πŸ‘ 1172    πŸ” 434    πŸ’¬ 36    πŸ“Œ 93
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North Tehran’s Aqdasiyeh oil depot is ablaze tonight after it was targeted by multiple US-Israeli airstrikes. Apocalyptic scenes filmed by Iranians driving on the nearby highway. Local reporters saying firefighters can’t put it out. This depot is critical energy infrastructure for Iran.

07.03.2026 23:06 β€” πŸ‘ 1728    πŸ” 884    πŸ’¬ 74    πŸ“Œ 215

Lindsey should see his doctor because he's had an erection for more than 4 hours.

08.03.2026 20:16 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

The pentagon refusing to give a simple yes or no to this question is pretty telling of itself

07.03.2026 18:49 β€” πŸ‘ 908    πŸ” 342    πŸ’¬ 28    πŸ“Œ 9

That's a really good question. Early echinoderms origins are still being studied. Some Cambrian echinoderms like Gogia and Helicoplacus really don't show organized 5 point symmetry.

There are also Ediacaran organisms with 3 point symmetry like tribrachidium.

07.03.2026 22:12 β€” πŸ‘ 2    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
Photograph of a fossil fish skull in right lateral view. The bone is dark brown/black against a gray matrix.

Photograph of a fossil fish skull in right lateral view. The bone is dark brown/black against a gray matrix.

Out now in Contributions from me and @gilespalaeo.bsky.social, a deep dive into an early member of the sturgeon and paddlefish lineage. Bear with me, but there’s a long backstory highlighting uncertainty about the anatomy of living species and how well-studied fossils can still yield new insights.

07.03.2026 17:37 β€” πŸ‘ 76    πŸ” 29    πŸ’¬ 2    πŸ“Œ 6
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Perspective.

07.03.2026 17:04 β€” πŸ‘ 76    πŸ” 20    πŸ’¬ 9    πŸ“Œ 1
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What

07.03.2026 16:08 β€” πŸ‘ 465    πŸ” 115    πŸ’¬ 25    πŸ“Œ 18

Dear Russia,

Iran's fire is making oil prices spike.

Spiking oil prices makes economic problems for us, so we're making it easier for you to sell more oil.

In sum, Iranian military success against us reduces economic pressure on you.

Just, you know, FYI.

Sincerely,
The geniuses leading America

07.03.2026 15:33 β€” πŸ‘ 1365    πŸ” 402    πŸ’¬ 49    πŸ“Œ 7

there's so much bad in the world but there's also people who lift up and carry an elderly bat around every day so he can pretend he's flying again, and that's the part of the world I think is worth fighting for

07.03.2026 15:46 β€” πŸ‘ 21760    πŸ” 6547    πŸ’¬ 89    πŸ“Œ 159
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Couldn't agree more.

07.03.2026 13:00 β€” πŸ‘ 1324    πŸ” 322    πŸ’¬ 24    πŸ“Œ 18

Yes. Lots of great fossils can be found around Alpena.

07.03.2026 15:34 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

My BCBS insurance went up 15% this year and I felt lucky compared to many.

This is what I get.

Burn it all down.

06.03.2026 20:33 β€” πŸ‘ 2    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
kevinrkirk 2d
@ Threads
Why are we bothering with the Strait of Hormuz when we could simply do this? Explain it to me like l'm 5.

(Drawing of chopping of part of land)

suahuatica 2d
MOUNTAIN HARD AND BIG, WATER NO UP. MANY MANY DIG DIG.

kevinrkirk 2d @ Threads Why are we bothering with the Strait of Hormuz when we could simply do this? Explain it to me like l'm 5. (Drawing of chopping of part of land) suahuatica 2d MOUNTAIN HARD AND BIG, WATER NO UP. MANY MANY DIG DIG.

Happy Friday. Don’t skip school.

06.03.2026 14:04 β€” πŸ‘ 4344    πŸ” 870    πŸ’¬ 165    πŸ“Œ 99
The Washington Post
Breaking News
Post Exclusive
27 minutes ago
Justice Department targets Cuban officials, aims for indictments
The effort to bring charges against Cuban officials coincides with President Donald Trump saying that his administration is eyeing Cuba as the next country whose government might be overthrown, following the capture of Venezuela's NicolΓ‘s Maduro in early January and the killing of Iran's supreme leader on Saturday.

The Washington Post Breaking News Post Exclusive 27 minutes ago Justice Department targets Cuban officials, aims for indictments The effort to bring charges against Cuban officials coincides with President Donald Trump saying that his administration is eyeing Cuba as the next country whose government might be overthrown, following the capture of Venezuela's NicolΓ‘s Maduro in early January and the killing of Iran's supreme leader on Saturday.

A regime that values domestic and international violence above the rule of law is unsustainable.

06.03.2026 19:18 β€” πŸ‘ 857    πŸ” 257    πŸ’¬ 18    πŸ“Œ 26

SHOULD THE U.S BLOT OUT THE SUN AND USHER IN AN AGE OF ETERNAL DARKNESS? - Gallup 2/20/26-3/5/26

NO - 41%
YES - 38%
UNSURE - 21%

06.03.2026 19:09 β€” πŸ‘ 13675    πŸ” 2977    πŸ’¬ 325    πŸ“Œ 185
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This is another Agaricocrinus in my collection that shows the start of a regenerated arm.

Many echinoderms (like starfish and brittle stars) can regenerate damaged limbs.

#FossilFriday

06.03.2026 19:27 β€” πŸ‘ 8    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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Agaricocrinus is a common Mississippian crinoid, but very beautiful. This specimen is from the Edwardsville Fm of Indiana near Crawfordsville. Each arm has delicate pinnules that would filter water for food.

#FossilFriday

06.03.2026 19:19 β€” πŸ‘ 44    πŸ” 11    πŸ’¬ 1    πŸ“Œ 0
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A really nice example of a Dolatocrinus calyx from the Devonian Thunder Bay limestone of Alpena. The stem would have connected in the center of the star and the arms would have attached on the U shaped bumps on the left pic.

This shows the 5 point symmetry common in most echinoderms.

#FossilFriday

06.03.2026 19:12 β€” πŸ‘ 286    πŸ” 28    πŸ’¬ 14    πŸ“Œ 0
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I'm used to much longer Onychodus teeth with curves. This one is from the Genshaw formation of Alpena.

#FossilFriday

06.03.2026 18:35 β€” πŸ‘ 2    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

Excellent! Thank you!

06.03.2026 18:29 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

Almost there…

06.03.2026 16:51 β€” πŸ‘ 1988    πŸ” 386    πŸ’¬ 81    πŸ“Œ 13
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Some fish teeth were very tiny!

This is from the Devonian Silica Shale of Ohio.

@friedmanlab.bsky.social Any ideas on an ID for this?

#FossilFriday

06.03.2026 17:01 β€” πŸ‘ 10    πŸ” 1    πŸ’¬ 1    πŸ“Œ 0
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This is an Alpena Limestone bioherm. Most of the layers are horizontal. About half way up the the wall the layers bulge where there was an island of life. Corals and crinoids established a hard ground and other life followed.

#FossilFriday

06.03.2026 16:52 β€” πŸ‘ 10    πŸ” 1    πŸ’¬ 0    πŸ“Œ 0