Life looked different after an asteroid crashed into the planet around 66 million years ago. The dinosaurs died out, the arboreal mammals declined, and the terrestrial mammals thrived. The traditional ...

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

Life looked different after an asteroid crashed into the planet around 66 million years ago. The dinosaurs died out, the arboreal mammals declined, and the terrestrial mammals thrived. The traditional ...

Early mammals had dark inconspicuous fur and only came out at night until dinosaurs became extinct, scientists believe. A study of colouration of mammals that lived in the Mesozoic era – around ...

This is the Hadrosaurid (duck-billed dinosaur) skeleton of Edmontosaurus. This image relates to a paper that appeared in the Oct. 5, 2012, issue of Science, published by AAAS. The paper, by ...