The story of the dinosaur extinction gets retold so often that it starts to feel like settled trivia: a rock falls from the sky, the dinosaurs die, the end. Scientists have spent decades checking that ...

Sixty-six million years ago, a single asteroid hit Earth in the Yucatán Peninsula and killed off the dinosaurs. The disaster was local, but its effects were planetary. How can a regional calamity have ...

A tiny fragment of the asteroid that hit Earth 66 million years ago may have been found encased in amber -- a discovery NASA has described as "mind-blowing." It's one of several astounding finds at a ...