A newly discovered fossil shark, Pararhincodon torquis, reveals ancient insights into shark evolution, shedding light on its ...

The Arctic landscape during the Cretaceous Period may have been dominated by the dinosaurs, but the rivers and streams held something more familiar. Alaska's fresh waters 73 million years ago were ...

The best jaw for hunting fast fish is long and full of sharp teeth. This makes sense to us, but it also makes sense in nature ...

A previously unknown shark once swam around the shores of the U.K. more than 70 million years ago. The new species, named ...

New fossil evidence suggests echidnas evolved from a water-dwelling ancestor, not a land-based one. The bone structure ...

This 375-million-year-old fish, the closest known relative of the ancestors of limbed animals such as humans, likely evolved the foundation for rear legs even before the move to land, researchers say.