The number of dinosaurs may have been stable before the asteroid impact, despite evidence that species were getting less ...

An analysis of North America’s fossil record for the 18 million years before dinosaurs disappeared suggests the prehistoric ...

To find answers, a team of researchers studied North America’s fossil record, focusing on the 18 million years before ... year time period in question, the proportion of land the four dinosaur ...

A new study suggests that dinosaurs likely weren't in decline before an asteroid wiped them out 66 million years ago; instead ...

Were dinosaurs doomed and already on their way out before ... four time points within the final 18 million years of the Cretaceous period. Dinosaurs Were Not in Decline Their results suggest that, ...

The idea that dinosaurs were already in decline before an asteroid wiped most of them out ... They found that, during this time, the proportion of land the four dinosaur clades likely occupied ...