Dan Peppe

Using Archival Japanese Paper and Thermoplastic Resins to Prepare Fossils for Storage, Display, Transport, and Radiography Kozo washi is an archival-grade paper commonly used in the conservation of museum objects. This paper can be combined with widely used archival adhesives ...

If you work on fragmentary fossil material, check out this method published in JoVE Journal developed by my PhD student, Dava Butler, and colleagues that can be used to stabilize & repair fossil material using archival Japanese paper and typical fossil prep resins: app.jove.com/v/68979/usin... 🧪🦴🦣

ACCE+ DLA Programme: Morphological Trait Evolution in Isolated Populations of Large Mammals and its Implications for Rewilding in the UK at University of Liverpool on FindAPhD.com PhD Project - ACCE+ DLA Programme: Morphological Trait Evolution in Isolated Populations of Large Mammals and its Implications for Rewilding in the UK at University of Liverpool, listed on FindAPhD.co...

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!

Gorgeous red and green aurorae over a lighted city below.

Gorgeous picture of red and green aurorae over a lighted city below.

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

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...

The Case of the Tiny Tyrannosaurus Might Have Been Cracked

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.

This is so fascinating. Do you think mammal communities were more broadly distributed or that some change during the Holocene prompted migration?

Such an awesome illustration!

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

Students with fossils on table for National Fossil Day presentation

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!

Thanks Nick!

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 cane rat of African affinity from the Middle Miocene ape locality of Ramnagar (J&K), India A short-ranging Cane Rat of African affinity discovered from a Miocene Ape locality of Ramnagar. (a) An outcrop of Siwalik sediments at Ramnagar. (b) Map of India showing the location of Ramnagar, J&...

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 evidence reveals dinosaurs were thriving right up to the moment the asteroid hit Newly dated fossils from New Mexico challenge the idea that dinosaurs were in decline—and suggest instead they had formed flourishing communities.

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. 🧪

What really killed the dinosaurs? These rocks may unlock the answer. New dating techniques at a fossil site in New Mexico attempt to dispel the theory that dinosaurs were already in decline before the fateful asteroid hit.

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.

Four panel figure. Panel A shows map of western north ameria indicating major Laramide basins and hightlight the study area in the San Juan Basin of NW New Mexico. Panel B shows geologic map of the San Juan

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 Mexico dinosaurs including Alamosaurus watch the asteroid hit the Yucatán about 3,000 kilometres away, 66 million years ago

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/...

Late-surviving New Mexican dinosaurs illuminate high end-Cretaceous diversity and provinciality It has long been debated whether non-avian dinosaurs went extinct abruptly or gradually at the end-Cretaceous (66 million years ago), because their fossil record at this time is mostly limited to nort...

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 !