About 95 million years ago, a juvenile crocodyliform nicknamed Elton lived in what is now southwest Montana at the edge of the Western Interior Seaway. Subscribe to our newsletter for the latest ...

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 ...

A version of the dodo bird (Raphus cucullatus) could make a return someday soon. Colossal Biosciences announced this week several milestones in its quest to bring the extinct species back to life. On ...

A Texas-based startup has revived the long-extinct dire wolf, but should we take their efforts with a pinch of salt?