A century-old fossil once thought to be a worm is now rewriting the story of arthropod evolution as the first-known nonmarine ...

Researchers have reexamined the skull musculature of coelacanths, a lineage of fish dating back 400 million years, and discovered that many anatomical structures had been previously misidentified. The ...

Scientists found the 500-million-year-old fossil of a "penis worm" in the Grand Canyon—and reconstructed how the creature would have used its strange mouth to feed.

What if one of the most iconic “living fossils” has been misleading evolutionary biology for decades? The African coelacanth, ...