The findings suggest that mass extinctions are not always caused by a single dramatic event.

About 66 million years ago, dinosaurs ruled the Earth in a very different environment than we see today, with some creatures demonstrating indomitable power, while others thrived in different ways.

An artist's imagining of a saprotrophic fungus. (Juan Gaertner/Science Photo Library/Getty Images) In the wake of the ...

Scientists studied ancient fungal spores and discovered Earth may already have been under stress before the asteroid wiped out the dinosaurs.

Around 66 million years ago, the reign of the dinosaurs came to a fiery end. An asteroid about 7 miles (12 kilometers) wide, flying at 27,000 mph (43,000 km/h), slammed directly into Earth. The impact ...

Sixty-six million years ago, a colossal asteroid, about 10km in diameter, struck Earth in the area of what is now the Caribbean, triggering instantaneous and catastrophic changes that led to the ...

In all, 75% of Earth's species went extinct, including the nonavian dinosaurs. So how did some animals ‪—‬ including species ...

In a remarkable geological find in Italy, a delicate clay layer was uncovered, marked by unusually high levels of iridium—a rare element on our planet but frequently found in meteorites. This ...

When you think of dinosaurs, do you still imagine giant gray scaly beasts that went extinct? Get ready to have your mind ...

A great Tyrannosaurus rex strides through the conifer trees of her territory, sniffing the air. She picks up the scent from the carcass of a dead horned dinosaur, Triceratops, that she was feeding on ...

New life may have evolved surprisingly fast after a famous mass extinction event about 66 million years ago. University of Texas at Austin Jackson School of Geosciences / John Maisano Some 66 million ...