Some animals are memorable because of their size. Others because of how dangerous or rare they are. But then there are a few ...

Prehistoric animals are often pictured as distant fossils, yet a surprising number of species still walk, swim, and crawl across Earth with body plans that echo deep time. Strictly speaking, ...

Evolution is usually a masterpiece of efficiency, but every once in a while, it feels like the natural world ran out of resources and had to finish a project using whatever leftovers were in the bin.

Koalas with the bodies of lions. Elephants the size of your dog. Gigantic, 8-foot-tall sloths. These aren’t creatures found in science fiction: They walked our planet a million years ago, during the ...

Nature is incredibly beautiful, but it can also be dangerous. Every year, it brings new life into the world, tiny newborns and species that have survived for generations. Some animals have even ...