(The Conversation is an independent and nonprofit source of news, analysis and commentary from academic experts.) Imagine a sloth. You probably picture a medium-size, tree-dwelling creature hanging ...

These "total monsters of fishes" are extinct today, though new clues about their lives come from CT scans and their closest ...

TEMPE, Ariz. — A team of scientists from Arizona State University has uncovered a collection of fossilized teeth at a field site in Africa that are believed to belong to a newly discovered species.

Fossil teeth unearthed in Ethiopia suggest two distinct human ancestor species lived alongside each other between 2.6 and 2.8 million years ago, reshaping what is known about our evolution. The 13 ...

Otodus megalodon was the largest predatory fish in Earth's history. Measuring up to 24 meters, it was longer than a truck with a trailer and weighed almost twice as much. Embedded in its jaws were ...