This work could not have happened without the financial support of NSF and the carefully protected U.S. BLM lands in the De-Na-Zin Wilderness Area. It shows how national lands are used in so many ways, like understanding ancient ecosystems and their vulnerabilities to sudden environmental change

Dinosaurs weren’t doomed to extinction, instead they were thriving right up until the end-Cretaceous asteroid impact.

Combining the new dates for the San Juan Basin dinosaurs with ecological modeling of dinosaur occurrences across North America, we show that dinosaurs were not declining leading up to the end-Cretaceous extinctions. Instead, the were diverse and living in provincial northern and southern communities

We used multiple dating methods to show that the Naashoibito dinosaurs in southern North America lived at the same time as the iconic dinosaurs from the Hell Creek area in Montana, Wyoming, and the Dakotas.

5/6 Mammals diversify rapidly, within about 300,000 years after Chicxulub. No Paleocene non-avian dinosaurs are found in here: every dinosaur fossil occurs below the K/Pg boundary.

4/6 Dinosaurs in New Mexico were diverse and thriving to the end. Western North America shows at least two bioprovinces along a north-south gradient with distinct regional faunas.

3/6 Naashoibito is contemporaneous with the Hell Creek Formation and is among the best-dated terminal Cretaceous dinosaur faunas from southern Laramidia.

2/6 🦖 For over a century, the K/Pg story came mostly from the northern Great Plains. New Mexico now joins the conversation. Our Science paper dates the Naashoibito Member (San Juan Basin, NM) to <340 ka pre-K/Pg using high-precision ^40Ar/^39Ar + magnetostratigraphy.

The best way I can describe why Wikipedia is the optimal model for all of us is that it is a knowledge base that is crowdsourced BY HUMANS with discussions, revisions, moderation BY HUMANS. It is also transperant (we can see who makes edits)

The dumb AI slop is like an opaque synthesis by machines.

Also, if you can, donate to wikipedia at least once per year. It can be like $5 - the same amount as a cup or two of coffee per year.

If the majority of us did this, then it would give the folks at Wikipedia the $$$ they need to maintain this excellent resource that we all get to use for free.