New evidence has emerged that dinosaurs in North America were thriving, and not in decline, before the asteroid hit.

Fossil evidence from New Mexico shows dinosaurs were still strong, diverse, and thriving before their sudden extinction 66 ...

Of all the mysteries surrounding dinosaurs, none has sparked more debate than how their era ended—was it a gradual decline or ...

To gain a better understanding of the creature, a team at the University of Chicago led by anatomist Paul Sereno tracked down ...

For decades, many scientists believed dinosaurs were already dwindling in number and variety long before an asteroid strike ...

New dates for a long-debated New Mexico fossil site reveal that dinosaurs were thriving and regionally diverse until the end-Cretaceous asteroid ...

New fossils from New Mexico reveal dinosaurs were thriving—not dwindling—when the asteroid brought their reign to a sudden ...

"The pace of change we’re seeing today is unlike anything we know of in the past 66 million years," said ecologist Jack Hatfield.

Learn about the mummified dinosaurs that have had their features preserved in a layer of clay after being submerged in ...

New findings indicate dinosaurs were flourishing just before the asteroid strike. Fossils from New Mexico show diverse and ...

New dating of New Mexico rocks suggest diverse dinosaurs thrived there just before the impact, countering the idea dinos were already on their way out.

For decades, many scientists believed dinosaurs were already dwindling in number and variety long before an asteroid strike sealed their fate 66 ...