A new and nearly complete skull of Vegavis iaai discovered in Antarctica suggests that modern birds originated before the end ...

Sixty-six million years ago, at the end of the Cretaceous Period, an asteroid impact near the Yucatán Peninsula of Mexico ...

In the long and storied history of earth, there have been five mass extinctions, the most famous, of course, being the ...

Alexandra Bell is bringing more than a decade of experience in nuclear policy to the organization that sets the Doomsday ...