An analysis of North America’s fossil record for the 18 million years before dinosaurs disappeared suggests the prehistoric creatures’ extinction wasn’t inevitable.

Dinosaurs may have been finished off with a killer asteroid, but new research shows that they may already have been headed for a disaster all their own.

Everyone knows about the mass extinction that ended the Age of Dinosaurs. About 66 million years ago, a seven-mile-wide asteroid slammed into our planet and began a mass extinction that wiped out all ...

Were dinosaurs headed for extinction even before massive asteroid strike? ... “Dinosaurs were probably not inevitably doomed to extinction at the end of the Mesozoic,” Chiarenza said.

Dinosaurs may have been finished off with a killer asteroid, but new research shows that they may already have been headed for a disaster all their own.

By Katie Hunt, CNN (CNN) — It’s a long-standing debate in paleontology: Were dinosaurs thriving when an asteroid hit Earth one fateful spring day 66 million years ago, or were they already on ...

By Katie Hunt, CNN (CNN) — It’s a long-standing debate in paleontology: Were dinosaurs thriving when an asteroid hit Earth one fateful spring day 66 ...

By Katie Hunt, CNN (CNN) — It’s a long-standing debate in paleontology: Were dinosaurs thriving when an asteroid hit Earth one fateful spring day 66 ...

By Katie Hunt, CNN (CNN) — It’s a long-standing debate in paleontology: Were dinosaurs thriving when an asteroid hit Earth one fateful spring day 66 million years ago, or were they already on ...

By Katie Hunt, CNN (CNN) — It’s a long-standing debate in paleontology: Were dinosaurs thriving when an asteroid hit Earth one fateful spring day 66 million years ago, or were they already on ...

By Katie Hunt, CNN (CNN) — It’s a long-standing debate in paleontology: Were dinosaurs thriving when an asteroid hit Earth one fateful spring day 66 million years ago, or were they already on ...