New dating of dino ancestor challenges Triassic timeline

Dinosauromorphs showed up too late to be Permian extinction success story

illustration of  dinosauromorphs

FOSSIL BED  Early dinosaur ancestors like the pair on the right were thought to evolve around 10 million years before dinosaurs. But new dating of fossil layers in Argentina cuts that time in half, to about 5 million years.

Image courtesy of Victor Leshyk

This article is only available to Science News subscribers.

Subscribers, enter your e-mail address to access our archives.

Not a subscriber?

Science News is a nonprofit.

Support us by subscribing now.

More Stories from Science News on Paleontology

From the Nature Index

Paid Content