A large fish-eating dinosaur died beside a river 125 million years ago in Cretaceous Thailand. Now, the remains of this ancient predator are helping researchers better understand Asia's enigmatic spinosaurids.

The manumea, a critically endangered ground pigeon and one of the closest living dodo relatives, has been spotted multiple times in a remote Samoan rainforest.

A small study reveals that cats greet male owners more vocally than female ones. But the findings could be a result of cultural norms among the participants, rather than a universal cat behavior, scientists say.

Pumas in Patagonia, Argentina are eating penguins in a national park — and it's changing how the big cats are interacting with each other.

Warming temperatures appear to be driving genetic mutations in some polar bears to help them survive the shifting climatic conditions.