Arizonasaurus was an archosaur from the Middle Triassic.

Human activity may be triggering the greatest extinction event since the asteroid impact that wiped out the dinosaurs, ...

We’ve long heard that a meteorite likely wiped out the dinosaurs, but an international study is shedding light on how climate change may have played into the extinction of the dinos. A study recently ...

It's been 66 million years since dinosaurs roamed the Earth, and many may blame an asteroid's explosive collision with our planet for the end of the creatures' reign. But for years, scientists have ...

Sixty-six million years ago, a catastrophic asteroid impact wiped out 75% of Earth’s species, bringing an abrupt end to the reign of the nonavian dinosaurs. The 9-mile-wide (15 km) space rock struck ...

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