Sixty-six million years ago, an asteroid thought to be around 12 kilometers (7.4 miles) in diameter impacted the Earth, forming a crater 200 kilometers (120 miles) in diameter, and 1 kilometer (0.62 ...

Buried "megaripples" — some the size of five-story buildings — are helping scientists piece together the devastation following the impact that wiped out the nonavian dinosaurs.

(CNN)-- A team of scientists has agreed that a giant asteroid killed off dinosaurs and a majority of other species on Earth more than 65 million years ago. The researchers analyzed evidence and ...

It’s fun to imagine secret dinosaur survivors living today, hidden in a remote corner of Earth. But the truth of who made it ...

Did a collision with a giant asteroid or comet change the shape of ... According to scientists who maintain that dinosaur extinction came quickly, the impact must have spelled the cataclysmic ...

Dinosaurs are the extinct relatives of birds that roamed the lands and seas of ancient Earth. They first appeared around 240 ...

Sun-blocking dust from asteroid impact drove the dinosaur extinction The Chicxulub impact 66 million years ago filled the sky with fine silicate dust, which blocked out sunlight and lingered for ...

Find out what brought about the end of the dinosaurs and many other animals too ... this catastrophic event is still open to scientific debate. Evidence suggests an asteroid impact was the main ...

Did dinosaurs lose their dominance suddenly or ... Although geologists generally acknowledge that a comet or asteroid impact would cause these fractures, some scientists conclude that they could ...