This is not goodbye. I promise. Just because The Cambrian is shifting to an all-digital format after this week, it doesn’t mean the paper is going away. Neither am I. I’ve been answering two questions ...

What does it take for soft-bodied animals, built to rot not to rock, to persist for 500 million years in the Grand Canyon?

You've traveled 500 million years into the past to experience some of the most dangerous seas and alien organisms ever to ...

Biomechanical studies on the arachnid-like front "legs" of an extinct apex predator show that the 2-foot (60 centimeter) marine animal Anomalocaris canadensis was likely much weaker than once assumed.

A spiky worm with legs like noodles. A giant predator that looks like a cross between a walrus and a housefly. Many animals that evolved during the Cambrian period, 541 million to 485 million years ...

This animation created for Evolution: "Great Transformations" depicts creatures whose fossils were found at the Burgess Shale. As alien as these creatures seem, they are also surprisingly familiar.