A fossil misidentified for over a century is now reshaping what scientists know about how life first made the leap from sea ...

A 500 million-year-old fossil with a spider's brain structure suggests that arachnids may have evolved in the oceans.

Learn more about the nectocaridid, an ancient marine creature that looks like a squid but actually belongs to a family of formerly fierce, predatory worms.

Unsurprisingly 300,000,000 years ago, the world was extremely different at ground level. Sprawling forests primarily made of ...