Small fossils show mammals moved to the ground before the dinosaurs vanished. New plants changed habitats, giving better food ...

New research suggests the theory that dinosaurs were declining before Chicxulub is the result of a poor (and misleading) ...

Scientists analyzed the fossil record of North America in the 18 million years up to the asteroid impact between 66 and 84 ...

The idea that dinosaurs were already in decline before an asteroid wiped most of them out 66 million years ago may be ...