Picture this: the next time you see a sparrow hopping along a sidewalk or a hawk soaring across a blue sky, you’re witnessing ...

Knife-toothed reptiles called sebecids went extinct on the mainland 10 million years ago. New fossil evidence puts them on an island 4 million years ago.

Scientists have identified a new species of ancient mammal from a small jawbone found in Mongolia's Gobi Desert.

Ancient volcanic winters, not just carbon dioxide warming, likely triggered the end-Triassic extinction when dinosaurs rose ...