Roughly 201 million years ago, the Triassic-Jurassic extinction event wiped out about 76% of all marine and land species on Earth. This cleared the stage for dinosaurs to take over for the next 135 ...

There might still be dinosaurs living on Earth today — if not for the giant asteroid. It's a long-debated issue, but now researchers say the idea Dinosaurs were in decline before the Chicxulub ...

Rocks formed immediately before and after non-avian dinosaurs went extinct are strikingly different, and now, tens of millions of years later, scientists think they’ve identified the culprit—and it ...

Discovered in Montana in 2016, the cherry-size coprolite contains feathers, bones and evidence of the bird's last meal before ...

Learn how feathers in dinosaur poop from the Hell Creek Formation could help explain why some birds survived the mass extinction while others died out. David DeMar Jr. was searching for fish fossils ...

About 66 million years ago, a dinosaur—maybe a T. rex or a Nanotyrannus—ate a bird. The record of that meal, in the form of fossilized poop, has survived to today, preserving the best example of a ...

Add Yahoo as a preferred source to see more of our stories on Google. A new study reveals dinosaurs in New Mexico were thriving just before the asteroid impact that ended their reign, overturning long ...

Human activity may be triggering the greatest extinction event since the asteroid impact that wiped out the dinosaurs, according to scientists. Their study, based on a review of decades of research on ...

Silhouette of the Tyrannosaurus called Stan. This "tyrant lizard king," was excavated and prepared by the Black Hills Institute. © Louie Psihoyos/CORBIS What ...

Dinosaurs ruled the Earth for over 150 million years. Compared to the mere 4–6 million years that scientists believe humans and their earliest ancestors have been on the planet, it wouldn't be ...