A long time ago, strange predators roamed the Caribbean — not just birds and snakes, but land-dwelling crocodiles that ...

Be glad you weren't around when these Jurassic speed demons lurked the Earth. They were faster, and deadlier, than anything alive today.

Together, these traits make bones heavier ... it is believed that dolphins and whales evolved from land animals and share lineage with hippos. But there are few examples that show evolution ...

Fossils of Tiktaalik roseae blended fins with hints of limbs and sported a flat head suited for peering above the waterline.