Add Yahoo as a preferred source to see more of our stories on Google. Dunkleosteus ruled a restless Devonian ocean, where armor met innovation. Here’s how modern science is rewriting the story of this ...

Ancient forests may have fueled a deep-sea oxygen boost nearly 390 million years ago, unlocking evolutionary opportunities for jawed fish and larger marine animals. New isotopic evidence shows that ...

Some 390 million years ago in the ancient ocean, marine animals began colonizing depths previously uninhabited. New research indicates this underwater migration occurred in response to a permanent ...