Discover how the extinction of dinosaurs opened up new opportunities for mammals, allowing them to grow vastly bigger and take over ecological roles. Larger mammals had advantages in defense, ...

Some animals once believed extinct have stunned scientists by reappearing decades, centuries, or even millions of years after vanishing from the fossil record or disappearing from human observation.

Dinosaurs have been fearsome and fascinating — but tragic? When science said dinosaurs were pea-brained and cold-blooded, humans took their demise as proof of the superiority of warm, clever mammals.

NEW MEXICO (KRQE) — The extinction of the dinosaurs may be ancient history, but that history continues to be rewritten, thanks in part to a professor at New Mexico State University. As Chad Brummett ...

Researchers analyzed 200 fossil teeth from ancient mammals in China, revealing how they adapted and diversified after the mass extinction Shutterstock Researchers analyzed 200 fossil teeth from 37 ...