On the final day of the Cretaceous period, some 66 million years ago, Earth was teeming with a dazzling variety of dinosaurs.

New research indicates that dinosaur populations in North America were thriving just before the asteroid impact 66 million years ago, which triggered their mass extinction. This finding offers a fresh ...

The asteroid that ended the age of dinosaurs unleashed more energy than any event in Earth’s history. Scientists now question whether the force was powerful enough to launch debris far beyond the ...

Scientists have long debated whether dinosaurs were in decline before an asteroid smacked the Earth 66 million years ago, causing mass extinction. New research suggests dinosaur populations were still ...

Dinosaurs appear to have been thriving before a giant asteroid hit the Earth 66 million years ago, paleontologists working in New Mexico said Thursday in the journal Science. Experts have long debated ...

LAS CRUCES — A geology professor who joined the New Mexico State University faculty this year is the lead author of a new paper addressing a long-standing question about the extinction of dinosaurs.

Dinosaurs weren’t dying out before the asteroid hit—they were thriving in vibrant, diverse habitats across North America. Fossil evidence from New Mexico shows that distinct “bioprovinces” of ...

In the long shadow of the asteroid that wiped out the dinosaurs, life appears to have bounced back with surprising speed. A new analysis of sedimentation rates suggests that the first wave of marine ...

One of the biggest debates in the dinosaur world is what was happening right before they went extinct. Were they already declining, or would they have thrived if not for the asteroid? Two recent ...

Every school child knows the dinosaurs were killed off by an asteroid smashing into the Earth some 66 million years ago. But scientists say the story may not be quite that simple, and that massive ...

Add Yahoo as a preferred source to see more of our stories on Google. This image provided by the University of Chicago shows the scaly skin of a young mummified dinosaur found in Wyoming. (Tyler ...