Add Yahoo as a preferred source to see more of our stories on Google. Dinosaurs look on as an asteroid plumets through the sky. 66 million years ago, a large asteroid crashed into Earth near Mexico's ...

About 66 million years ago, a city-size asteroid slammed into what is now the Yucatán Peninsula, ushering in a long period of darkness that snuffed out the nonavian dinosaurs. Researchers have long ...

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The miles-wide asteroid that struck Earth 66 million years ago wiped out nearly all the dinosaurs and roughly three-quarters of the planet's plant and animal species. It also triggered a monstrous ...

The Chicxulub impact structure in Mexico is widely believed to be the site of the asteroid impact that allegedly killed the dinosaurs. As Sergio de Régules reports, scientists are now preparing to ...