An curved arrow pointing right. This giant footprint is thought to have belonged to the Abelisaurus, a meat-eating dinosaur from the same group of dinosaurs as the T-Rex. Paleontologists think the ...

According to scientists who maintain that dinosaur extinction came quickly, the impact must have spelled the cataclysmic end. For months, scientists conclude, dense clouds of dust blocked the sun ...

Asthmatic? Your next attack may be brewing under the snow ...

The last 79 million years of the Mesozoic were particularly incredible — it was the age when dinosaurs dominated. Those years are known as the Cretaceous period, the longest portion of the ...

Did dinosaurs lose their dominance suddenly or gradually? Some scientists think the answer lies locked within the remnants of long-dormant volcanoes. Massive beds of ancient lava found around the ...