Thomas R. Holtz, Jr.'s Avatar

Thomas R. Holtz, Jr.

@arctomet.bsky.social

Tyrannosaur Expert; Dinosaur Paleontologist; University of Maryland Geology Faculty; Director of the College Park Scholars-Science & Global Change Program; Science Author; Cat Dad; πŸ¦–πŸ¦•

4,071 Followers  |  642 Following  |  2,322 Posts  |  Joined: 14.11.2024
Posts Following

Posts by Thomas R. Holtz, Jr. (@arctomet.bsky.social)

Video thumbnail

Alex Pretti and RenΓ©e Good were murdered by federal agents. Soon after, Secretary Noem labeled them 'domestic terrorists.’

I gave her the chance to recant and apologize for the pain she's caused their families with these outrageous lies. She refused.

04.03.2026 17:07 β€” πŸ‘ 3297    πŸ” 1092    πŸ’¬ 205    πŸ“Œ 60

Nudge nudge wink wink!

Say no more!

04.03.2026 21:40 β€” πŸ‘ 90    πŸ” 11    πŸ’¬ 8    πŸ“Œ 1

Pathetic. Sheehy needed to sit his ass down & stay out it. He is NOT law enforcement. Hope the Vet presses charges & sues.

05.03.2026 00:12 β€” πŸ‘ 5    πŸ” 1    πŸ’¬ 0    πŸ“Œ 0
Post image

How do animators ✍️ make animals (real AND fantasy) look so real? SCIENTISTS are essential!

Paleontologist Stuart Sumida has consulted on Hollywood's πŸ“½ biggest blockbusters: Beauty and the Beast, Harry Potter, How to Train Your Dragon, and more!

πŸ”Š Learn more: www.paleonerds.com/podcast/stua...

05.03.2026 01:35 β€” πŸ‘ 23    πŸ” 6    πŸ’¬ 0    πŸ“Œ 0
Video thumbnail

Balint to Noem: "You're the secretary of DHS -- for now. And you think you're immune from accountability. But I promise you this: one day he is not gonna be president anymore. And when that day comes, we will still be here. And in hearings like this, we are going to continue to prove your guilt."

04.03.2026 19:13 β€” πŸ‘ 21942    πŸ” 5995    πŸ’¬ 912    πŸ“Œ 531
Video thumbnail

Jeffries: "Article 1 of the Constitution provides Congress with the sole authority to declare war. Framers made that decision b/c they were concerned about kings plunging their people into unnecessary wars to pillage resources of others for the benefit of a tyrant and his family. Sound familiar?"

04.03.2026 21:06 β€” πŸ‘ 6308    πŸ” 1895    πŸ’¬ 215    πŸ“Œ 80
Video thumbnail

NOEM: I would disagree with the judge

CROCKETT: I'm sure you would, but can you tell me whether or not you have a law degree?

NOEM: A what?

CROCKETT: A law degree

NOEM: No I do no-

CROCKETT: Okay

04.03.2026 20:52 β€” πŸ‘ 25609    πŸ” 6667    πŸ’¬ 948    πŸ“Œ 544
Preview
An aberrant stem tetrapod from the early Permian of Brazil Abstract. Early evolutionary history of tetrapods is typically divided into two major phases: an initial diversification of archaic stem tetrapod groups, a

An aberrant stem tetrapod from the early Permian of Brazil url: royalsocietypublishing.org/rspb/article...

04.03.2026 13:18 β€” πŸ‘ 10    πŸ” 4    πŸ’¬ 0    πŸ“Œ 0
Post image

IMPORTANT!!! There has been a location change for the NEW YORK CITY March 7th National Day of Action rally!!!
The rally is now happening in City Hall Park from 12:00pm to 2:00pm.

Visit standupforscience.net/march7 to learn more!

#March7NYC
#standupforscience
#science
#savescience
#rally

03.03.2026 22:46 β€” πŸ‘ 44    πŸ” 26    πŸ’¬ 1    πŸ“Œ 3
03.03.2026 21:15 β€” πŸ‘ 208    πŸ” 45    πŸ’¬ 11    πŸ“Œ 4
Why Did Mammals Beat Dinos? Feat. Dr. Steve Brusatte
YouTube video by Animalogic Why Did Mammals Beat Dinos? Feat. Dr. Steve Brusatte

Why Did Mammals Beat Dinos? Feat. Dr. Steve Brusatte youtu.be/v0PtFnOTdAk?...

03.03.2026 18:44 β€” πŸ‘ 11    πŸ” 2    πŸ’¬ 1    πŸ“Œ 0
Why Evolution Made Your Teeth Hurt
YouTube video by PBS Eons Why Evolution Made Your Teeth Hurt

Why Evolution Made Your Teeth Hurt youtu.be/miPIUijJHdo?...

03.03.2026 18:17 β€” πŸ‘ 21    πŸ” 7    πŸ’¬ 0    πŸ“Œ 0
Preview
The dentition of tyrannosauroid theropods: a review - Discover Geoscience Discover Geoscience - Tyrannosauroidea is a clade of early-diverging carnivorous coelurosaur theropods known from the Middle Jurassic to Late Cretaceous that includes the eponymous Tyrannosaurus...

HernΓ‘ndez-Luna, C.A., Hendrickx, C., MarΓ­n-Leyva, A.H. et al. The dentition of tyrannosauroid theropods: a review. Discov Geosci 4, 96 (2026). doi.org/10.1007/s442...

03.03.2026 17:52 β€” πŸ‘ 23    πŸ” 8    πŸ’¬ 0    πŸ“Œ 1
Preview
Military leaders pushing 'Armageddon views' on troops as Iran war begins: complaint A combat-unit commander told non-commissioned officers Monday that the Iran war was part of God's plan to usher in the End Times and bring about Jesus Christ's second coming, according to a complaint ...

Jesus H. Christ! These fucking idiots really are this crazy. And they say the Iranians were ruled by religious fanatics!

*****

www.rawstory.com/military-267...

03.03.2026 16:33 β€” πŸ‘ 152    πŸ” 31    πŸ’¬ 26    πŸ“Œ 4
The Clash - London Calling (Official Video)
YouTube video by theclashVEVO The Clash - London Calling (Official Video)

#Geol204playlist For mass extinctions youtu.be/EfK-WX2pa8c?...

03.03.2026 13:14 β€” πŸ‘ 3    πŸ” 1    πŸ’¬ 1    πŸ“Œ 0
Preview
Sharks as apex predators in the Late Cretaceous Western Interior Seaway empirically revealed by zinc isotope analyses Food web structures and trophic interactions among Late Cretaceous marine taxa remain largely ambiguous due to the challenges in reconstructing ecolog…

www.sciencedirect.com/science/arti...

02.03.2026 21:20 β€” πŸ‘ 31    πŸ” 9    πŸ’¬ 0    πŸ“Œ 1
Preview
Carbon dioxide overload, detected in human blood, suggests a potentially toxic atmosphere within 50 years - Air Quality, Atmosphere & Health Air Quality, Atmosphere & Health - Anthropogenic activities are increasing the amount of carbon dioxide (CO2) in the atmosphere. There is mounting experimental evidence that lifetime exposure...

Larcombe, A.N., Bierwirth, P.N. Carbon dioxide overload, detected in human blood, suggests a potentially toxic atmosphere within 50 years. Air Qual Atmos Health 19, 44 (2026). doi.org/10.1007/s118...

02.03.2026 20:08 β€” πŸ‘ 13    πŸ” 4    πŸ’¬ 0    πŸ“Œ 2
Preview
New early Maastrichtian β€˜duck-billed’ dinosaur from HaΘ›eg Basin (DensuΘ™-Ciula Formation, Romania) documents an endemic clade of non-hadrosaurid hadrosauroids in the south-eastern Late Cretaceous European Archipelago We report the discovery of an associated incomplete hadrosauroid skeleton with cranial and postcranial elements from a new Maastrichtian (Upper Cretaceous) vertebrate site (FΓ’ntΓ’nele-3) north-west ...

New early Maastrichtian β€˜duck-billed’ dinosaur from HaΘ›eg Basin (DensuΘ™-Ciula Formation, Romania) documents an endemic clade of non-hadrosaurid hadrosauroids in the south-eastern Late Cretaceous European Archipelago: Journal of Systematic Palaeontology: www.tandfonline.com/doi/full/10....

02.03.2026 17:59 β€” πŸ‘ 38    πŸ” 7    πŸ’¬ 0    πŸ“Œ 3

Vermiform body plans has the advantage as being the starting point for all bilaterians!

02.03.2026 17:17 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
Line graph time series of 2026's daily Arctic sea ice extent compared to decadal averages from the 1980s to the 2010s. The decadal averages are shown with different colored lines with purple for the 1980s, blue for the 1990s, green for the 2000s, and white for the 2010s. Thin white lines are also shown for each year from 2000 to 2025. 2026 is shown with a thick gold line. There is a long-term decreasing trend in ice extent for every day of the year shown on this graph between February and April by looking at the decadal average line positions.

Line graph time series of 2026's daily Arctic sea ice extent compared to decadal averages from the 1980s to the 2010s. The decadal averages are shown with different colored lines with purple for the 1980s, blue for the 1990s, green for the 2000s, and white for the 2010s. Thin white lines are also shown for each year from 2000 to 2025. 2026 is shown with a thick gold line. There is a long-term decreasing trend in ice extent for every day of the year shown on this graph between February and April by looking at the decadal average line positions.

Monday ice update - #Arctic sea ice extent is currently the 2nd lowest on record (JAXA data)

β€’ about 560,000 kmΒ² below the 2010s mean
β€’ about 1,160,000 kmΒ² below the 2000s mean
β€’ about 1,530,000 kmΒ² below the 1990s mean
β€’ about 2,070,000 kmΒ² below the 1980s mean

More: zacklabe.com/arctic-sea-i...

02.03.2026 16:38 β€” πŸ‘ 68    πŸ” 20    πŸ’¬ 0    πŸ“Œ 2
Preview
Scoop: AI Slop Training for Aircraft Mechanics By some estimates Canada will soon be short thousands of trained aircraft mechanics. The people who keep our flights safe. The government came up with $25 million dollars to help.

β€œEverybody needs to know about this. We need to shut this down. This is aviation. This is training. There are safety issues here.” -Jeff Weeks

02.03.2026 13:00 β€” πŸ‘ 17    πŸ” 7    πŸ’¬ 1    πŸ“Œ 0

Exactly. Long-term constitutional reform must include substantial rollback of the Imperial Presidency, and not just because we might elect another moral and intellectual defective in the future. No democratic leader should have that much power.

01.03.2026 17:10 β€” πŸ‘ 79    πŸ” 15    πŸ’¬ 2    πŸ“Œ 0
Preview
Feds asked New Mexico to halt Jeffrey Epstein Zorro Ranch sex trafficking probe, records show Former AG says feds halted New Mexico’s Epstein inquiry without sharing promised evidence as state reopens Zorro Ranch investigation.

Former New Mexico Attorney General Balderas details how the FBI forcefully shut down New Mexico's criminal probe into what was up at Epstein's Zorro Ranch in Santa Fe Co. The feds insisted that they were running their own criminal probe and that NM's involvement would not be tolerated. It was a lie.

01.03.2026 19:56 β€” πŸ‘ 1335    πŸ” 718    πŸ’¬ 34    πŸ“Œ 45
Preview
US moving pregnant immigrant girls to Texas to avoid providing abortions, critics say Ex-official calls transfer of unaccompanied girls as young as 13, many pregnant due to rape, a human rights violation

Unaccompanied children as young as 13 who are pregnant, often from rape, are being moved to Texas so the Trump administration can avoid getting them access to abortion, critics say. My latest: www.theguardian.com/us-news/2026...

01.03.2026 18:02 β€” πŸ‘ 372    πŸ” 279    πŸ’¬ 3    πŸ“Œ 35
Preview
Diversity and function of the anterior dentitions in fossil and extant mammals - Palaeobiodiversity and Palaeoenvironments This paper reviews the morphological diversity of the anterior dentition (AD - incisors and canines) in fossil and extant mammals. The great diversity of the mammalian anterior dentition is due to mos...

von Koenigswald, W. Diversity and function of the anterior dentitions in fossil and extant mammals. Palaeobio Palaeoenv (2026). doi.org/10.1007/s125...

01.03.2026 13:58 β€” πŸ‘ 21    πŸ” 7    πŸ’¬ 0    πŸ“Œ 0
AI and paleontology: effects of vertebrate fossil sample size on machine learning image classification | Paleobiology | Cambridge Core AI and paleontology: effects of vertebrate fossil sample size on machine learning image classification

Current citation style:
MacFadden, B. J. et al. (2026). AI and paleontology: effects of vertebrate fossil sample size on machine learning image classification. Paleobiology, 1–17. doi: 10.1017/pab.2025.10084

www.cambridge.org/core/journal...

01.03.2026 13:52 β€” πŸ‘ 12    πŸ” 6    πŸ’¬ 0    πŸ“Œ 0
Preview
Uniqueness and predictability in evolution and the history of mollusks | PNAS Evolution is a historical process whose trajectories are determined in part by the introduction of new phenotypes. Although most phenotypes have ev...

www.pnas.org/doi/10.1073/...

01.03.2026 13:50 β€” πŸ‘ 11    πŸ” 3    πŸ’¬ 0    πŸ“Œ 0
We need to talk about naked mole rats - The Oatmeal This is a comic about naked mole rats, aka tube goblins.

theoatmeal.com/comics/naked...

01.03.2026 13:45 β€” πŸ‘ 7    πŸ” 2    πŸ’¬ 0    πŸ“Œ 1

www.legacy.com/us/obituarie...

01.03.2026 13:35 β€” πŸ‘ 4    πŸ” 1    πŸ’¬ 0    πŸ“Œ 0
Preview
US-Israeli strike on girls' school kills at least 85 students, Iran's judiciary says At least 85 students have been killed in US-Israeli strikes that hit an Iranian girls' school in Hormozgan province, Iran's judiciary said on Saturday. Washington has not commented on the reported str...

We killed 85 schoolgirls. We are not the good guys.

28.02.2026 16:00 β€” πŸ‘ 16997    πŸ” 6535    πŸ’¬ 469    πŸ“Œ 551