The scientists studied records of around 8,000 fossils from North America dating to the Campanian age (83.6 million to 72.1 million ... the asteroid strike wiped out the nonavian dinosaurs.

It’s a long-standing debate in paleontology: Were dinosaurs thriving when an asteroid ... in the 9 million years leading up to the asteroid strike. “It comes down to the fossil record and ...

A new study challenges the idea that dinosaurs were declining before the asteroid impact. Researchers at UCL Earth Sciences ...

It’s a long-standing debate in paleontology: Were dinosaurs thriving when an asteroid hit Earth one fateful spring day ... peaked about 75 million years ago and then declined in the 9 million years ...

Dinosaurs weren't in decline when an asteroid smashed into Earth and wiped them out, scientists say. Instead, the idea that dinosaur diversity was declining before the asteroid struck 66 million ...

When colossal asteroids rock Earth, it's not all doom and gloom. The menacing asteroid that wiped out non-avian dinosaurs left a colossal marine crater in what's now the Yucatan Peninsula.