Anyone interested in applying for PhDs at #2025SVP, email or find me or @tguillerme.bsky.social for a chat if you’re interested in morphological trait evolution with a conservation theme: 🔗 www.findaphd.com/phds/project...

My student, Evan Cerna presenting at #2025SVP on a new Cretaceous dinosaur trackway in the Glen Rose Formation in central Texas!

I am on my way home to Toronto and the aurorae are absolutely phenomenal. If you are anywhere in the northern half of the continent, get outside and look up! Or better still, put your camera on a 10 second exposure and point it up.

Smallest hints of the northern lights tonigjt in Waco, TX

Having no reason to hire qualified faculty is a feature, not a bug. www.texastribune.org/2025/11/10/t...

I wanted to offer some thoughts on the Gates climate memo that has been circulating this week. While I can't directly speak for others, I can say that my own response is one of dismay & deep frustration (and that this view is shared by many climate/Earth scientists). [1/n]

Sixty days left to save the Museum of the Earth. Please donate if you can, and share. This is not only one of the most important fossil collections in the world, it also home to the world’s best plushies: Paleozoic Pals! www.priweb.org/mortgage-cam...

My latest for @nytimes.com! For 40 years, paleontologists have grappled over whether a small tyrannosaur — named Nanotyrannus — was its own animal, or simply a teenage T.rex. The debate has been ... contentious. Which is why it's so fun to finally be able to say this: Folks? Nanotyrannus is real.

I cannot tell you how many tech journalists at prominent media organizations do not understand this

Members of the LEAFF Climate lab shared some of their exciting research and fossils at the Mayborn Museum’s Sic ‘Em Science Day celebrating #nationalfossilday! 🧪🪨

That’s no ballroom!

Biggest takeaway from this study: Dinosaurs were doing fine right up until the impact! #FossilFriday

New dates for the Naashobito faunas from New Mexico help show that dinosaur diversity was declining making them weren’t extinction. Instead dinosaurs were diverse and thriving right up until the end-Cretaceous asteroid impact 🧪🪨🦕🦖☄️☠️

Cool paleo-🧵about the last dinosaurs from 66 mya in what's now New Mexico, & how their fossil record points toward diverse communities during the last few hundred-thousand years before a demise-inducing meteorite impact. Article in @science.org at the link: www.science.org/doi/10.1126/... 🧪🦖🦕☄️

A new cane rate from a middle Miocene fossil locality in Ramnagar, India do uments the species first occurrence outside the Potwar Plateau and helps constrain the age of the fossil site, and the apes found therein, to about 13 Ma. anatomypubs.onlinelibrary.wiley.com/doi/10.1002/... 🧪🪨🐀

New dates on fossils from New Mexico reveal a community of dinosaurs that were thriving right before the asteroid strike, including 80-foot-long, 30-ton giants like Alamosaurus. I’ll tell you more in my latest for NatGeo. 🧪

Paleontologists still debate whether dinosaurs were in decline even before the asteroid wiped them out. New precise dating techniques of a century-old fossil site in New Mexico are giving scientists a better idea.

Lastly, this N-S bioprovincialism persists after the mass extinction and is seen in early Paleocene mammalian communities suggesting that the biogeographic structure was not destroyed by the mass extinction event.

We then used ecological modeling to show dinosaur communities were partitioned into two different bioprovinces during the terminal Cretaceous across western North America, driven by differences in climate. This suggests dinosaurs in North America diverse & thriving leading up to the K/Pg boundary.

This Naashoibito dinosaur community was dominated by the giant sauropod Alamosaurus and crested Lambeosaurine hadrosaurs, which is a marked difference than the coeval Hell Creek Formation.

Using magnetostratigraphy and Ar/Ar geochronology, we were able to constrain the age of Naashoibito Member deposition, and the major vertebrate fossil localities, to no older than 66.38 Mya.

We provide new age constraints on the Naashoibito Member in the San Juan Basin of NW New Mexico showing these rocks, and their unique dinosaurs, are among the last non-avian dinosaurs from the last 340 Kyr of the Cretaceous, contemporaneous with the famous Hell Creek fauna. doi.org/10.1126/scie...

Our new paper is out in @science.org #ScienceResearch Our understanding of the dinosaurs at the very end of the Cretaceous is limited by few localities. What dinosaur biogeographic patterns were present leading up the K/Pg boundary? What can these tell us about end Cretaceous dinosaur communities

New paper today in @science.org: we date the Naashoibito Member (New Mexico) to 66.4–66.0 Ma, coeval with the Hell Creek, with important remarks on pre-extinction dinosaur diversity & regionalisation in North America 🦖🦕☄1/ Art: @nataliajagielska.bsky.social 🔗 www.science.org/doi/10.1126/...

Read the paper here! www.science.org/doi/10.1126/...

These were the dinosaurs that faced the asteroid. Some of the last survivors. They lived in New Mexico, 66 million years ago. Among them was Alamosaurus, the size of a jetplane. We unveiled them, and their true age, today in a new paper in @science.org !

Excited to share the results of collaborative research in the San Juan Basin in New Mexico published today in @science.org that provides new age constraints for the Naashobito dinosaurs from New Mexico, like the giant sauropod, Alamosaurus: www.science.org/doi/10.1126/...

Looking for a graduate program in paleobotany, paleoclimatology, and/or terrestiral sedimentology? Attending #GSA2025 next week? Please reach out so we can chat! Recruiting MS students for Fall 2026 for projects focused on the late Cretaceous - early Paleogene of western North America.

No Kings Waco TX #nokings

A rare job opportunity for Invertebrate Zoology: fieldmuseum.hrmdirect.com/employment/j...

Just got back from mapping Miocene-Pliocene sed rocks and fault blocks in West Turkana, Kenya with my great colleague @danpeppe.bsky.social. Here's the border fault separating Early Miocene strata (our focus) from the Turkana Basin. Image faces north. Losidok peak barely visible in the distance.🧪⚒️

Another great summary of our recently published work on the climate, ecology, and environment of the early Miocene in western Kenya @munyaka.bsky.social @mcnultylab.bsky.social urls.grow.me/7Gl5Oyr91N

#nokings Salisbury, CT

Great summary of @munyaka.bsky.social’s recently published dissertation research reconstructing the environments of our early ape ancestors in Kenya!

A summary of our new paper, featuring the brilliant work of @munyaka.bsky.social and @danpeppe.bsky.social. Always new surprises from the fossil record!

Early apes lived in a land of forest fires, floods, and volcanoes, according to new early Miocene fossils. Research by @mcnultylab.bsky.social, @danpeppe.bsky.social, @munyaka.bsky.social, @paleosol.bsky.social, @susycote.bsky.social, @abigail-hall.bsky.social & colleagues. eos.org/research-spo...

Congratulations to @munyaka.bsky.social on this outstanding dissertation research! Special thanks to his advisor @danpeppe.bsky.social and to the other authors for a great collaboration: #paleoanthropology ∩ #paleontology ∩ #geology ∩ #forestry! agupubs.onlinelibrary.wiley.com/doi/epdf/10....

Question for anyone who does field mapping - do you have a preferred device for mapping & tracking exposures while in the field?

ATTENTION: NSF GRANT RECIPIENTS We received a heads up from a trusted source that you should proactively download/print/screen shot any documentation on research.gov pertaining to your NSF awards, both those that are current and any that have closed in the last 5-6 years. 1/n

🚨 Practical URGENT tip for NSF grantees: Out of an abundance of caution, I would right now go into Research.gov and… 1. Download your NSF award letters. 2. Print PDF your annual reports. 3. Screenshot the status table for annual reports. NSF is planning maintenance tomorrow to Research.gov

Who needs potentially life-saving weather forecasts and radar when we could all just look out the window.. #CAwx

The Bureau of Reclamation office in Durango is on this list. It manages the dams in the San Juan-Animas-Dolores watersheds of the upper Colorado. (Vallecito, Lemon, Navajo, McPhee, Lake Nighthorse, maybe others that I can't remember)

This includes the USGS Hawaiian and Alaska Volcano Observatories. HVO's Ironworks is a temporary space while a new facility is built to replace the Observatory critically damaged in 2018. Both groups are near their volcanoes. Neither has anywhere to go and both have been forbidden from telework.

Congress has just released a list of federal DOI offices to be closed under the ongoing massacre of our natural resource agencies -- it's extensive and includes many important NPS, BLM, USGS and USFWS facilities across the country. Truly horrific. democrats-naturalresources.house.gov/imo/media/do...

Just got this passed on to us, about the damage at NIH's home campus -- the largest biomedical research institute in the world. "The articles on cuts and damage assessments are largely grants focused. The grants program is a bit easier to characterize because it’s visible outside the NIH..." 🧪 1/

It's not much, but it's there to help for any colleagues who find themselves needing it: www.paleosoc.org/paleontologi...

Please let the GEO/EAR community know: Program Directors and Mission Support who’ve been at NSF under two years were just terminated via Zoom. Even those of us whose offer letter stated one probationary year and whose government data states “permanent”.

1/8. This week I had a few different conversations with scholars who, in the face of the attacks on science and institutions of learning in the U.S., are wondering what to do. One suggestion I have is: keep doing your work. It matters in and of itself. Why do I say that? A few reasons.