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 ...

Scientists at the American Museum of Natural History investigated old specimens that had been at the museum for decades and ...

More mammals were living on the ground several million years before the mass extinction event that wiped out the dinosaurs, new research has revealed. More mammals were living on the ground several ...

Researchers suggest that ground-based mammals fared better than their arboreal relatives during the end-Cretaceous extinction thanks to their lifestyle. Reading time 2 minutes The end-Cretaceous ...

Latest research has revealed that first mammals and first dinosaurs appeared on earth at about the same time and that the ancestral mammals underwent dramatic evolution while challenging the dinosaurs ...

Though dinosaurs dominated the Earth’s land and seas 145 million years ago, they were far from the only creatures around. Early mammals lived among them, carving out their own ecological niches in ...

Fossils reveal dinosaurs were flourishing in diverse ecosystems right up until the asteroid impact ended their reign.

A mammal phylogeny with colors depicting the diet of living species and their ancestors; silhouettes of myrmecophagous mammals surround the tree. An inset diagram in the upper right illustrates ...

Slow start A near complete fossil of an ancient mammal proves it wasn't much of a runner. But with the dinosaurs gone, it really didn't need to be. Many of the mammals that emerged right after the non ...

Scientists found an unexpected aging pattern in a mostly intact juvenile mammal skeleton from the paleontological period. By Jack Tamisiea Small mammals often live fast and die young. Rodents and ...