An asteroid extinguished all the dinosaurs except for birds. Here’s why

On the final day of the Cretaceous period, some 66 million years ago, Earth was teeming with a dazzling variety of dinosaurs.
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A meteor hits one location – so why did all of Earth’s dinosaurs disappear?

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 ...