Scientists discover there wasn’t just one asteroid which killed dinosaurs – after 66 million years - Evidence of a second ...

The extinction of dinosaurs reshaped rivers, forests, and landscapes—changes still recorded in the rock layers across North America.

Late Cretaceous dinosaurs may have cut back vegetation, creating large floodplains. When the asteroid hit, those floodplains ...

Some 66 million years ago, a devastating asteroid strike is believed to have been behind the mass extinction of the dinosaurs.