The age of dinosaurs ended in cataclysm one spring day 66 million years ago when an asteroid 7.5 miles (12 km) wide hit Mexico's Yucatan peninsula, triggering the extinction of those remarkable ...

Experts now say dinosaurs would have likely continued to dominate the planet had it not been for the asteroid.

More than a century of fossils pulled from the ground told a straightforward story: dinosaurs thrived, then declined, then vanished in a fiery cataclysm 66 million years ago. The idea is that ...

The age of dinosaurs met an unlikely end — because had the cosmic impact that doomed it hit just about anywhere else on the planet, the "terrible lizards" might still roam the Earth, a new study ...

Dinosaurs were facing a crisis even before the asteroid hit, with extinctions outpacing the emergence of new species — a situation that made them "particularly prone to extinction," a new study ...

The city-size asteroid that hit Earth 66 million years ago and doomed the dinosaurs to extinction came from the northeast at a steep angle, maximizing the amount of climate-changing gases ...

Dinosaurs went extinct roughly 66 million years ago, marking the end of the Cretaceous Period, after an asteroid about 7 miles wide struck what is now the Yucatán peninsula off Mexico.

So why did most dinosaurs die out, when a few -- namely, birds, as well as mammals and other creatures -- survived? In fact, many birds did go extinct, so it may have been random, Brusatte said.

The dinosaurs would have experienced "hell on earth" on the day the asteroid hit Earth 66 million years ago, paleontologists have found. In a new documentary, Dinosaur Apocalypse from NOVA ...

But what if I told you that the dinosaurs were already doomed well before that asteroid hit? At least, that seems to be the argument that researchers are making in a new study published in Science ...

When the asteroid hit Earth, it not only would have sent shockwaves through the planet. It also would have propelled around 2,000 gigatons of dust into the air. A rendering of a dinosaur in ...

(CNN) --The city-size asteroid that hit Earth 66 million years ago and doomed the dinosaurs to extinction came from the northeast at a steep angle, maximizing the amount of climate-changing gases ...