Whale ancestors were terrestrial mammals that walked on four legs. This bone structure that helped them walk eventually ...

A genomic atlas of Nematostella vectensis reveals how primitive animals created multiple cell types millions of years ago, ...

Earth’s first sponges may have been ghostly, soft-bodied pioneers—ancient animals that evolved long before their skeletons ...

Animals have evolved crab-like bodies at least five times throughout history, a process known as carcinization.

The next time you go wild swimming, whether in a lake, river or sea, you are probably sharing the water with one of your tiniest, yet closest relatives. Subscribe to our newsletter for the latest ...