Paleontologists unearthed fossils in the Grand Canyon dating back more than 500 million years that offer a new look into a ...

Half a billion years ago, a strange sea-dwelling creature called Mollisonia symmetrica may have paved the way for modern ...

A century-old fossil long mislabeled as a caterpillar has been reidentified as the first-known nonmarine lobopodian—rewriting what we know about ancient life. Discovered in Harvard’s museum drawers, ...

Did they travel together in a symbiotic relationship, or were they briefly brought together by thirst or fear of the ultimate predator?