The idea that dinosaurs were already in decline before an asteroid wiped most of them out 66 million years ago may be explained by a worsening fossil record from that time rather than a genuine ...

A new study suggests that dinosaurs likely weren't in decline before an asteroid wiped them out 66 million years ago; instead, there may just be limited fossils from that time period, challenging ...

Before the mid-1960s, it was widely believed that all dinosaurs were cold-blooded, slow-moving animals. But in the summer of 1964, a team of paleontologists led by John Ostrom discovered ...

For decades, paleontologists believed dinosaurs got their start in the southern half of the supercontinent Pangaea—Gondwana—then took millions of years to reach the north, known as Laurasia.

The idea that dinosaurs were already in decline before an asteroid wiped most of them out 66 million years ago may be explained by a worsening fossil record from that time rather than a genuine ...