Imagine drifting through a prehistoric sea more than 500 million years ago. The water teems with bizarre creatures, but none ...

Earth’s history is filled with incredible milestones, and the emergence of the first animals is one of the most captivating.

This daily feast-and-famine cycle in oxygen availability created an intense physiological challenge for early animals, forcing them to develop adaptations to handle fluctuations in nutrients. For ...

This stunning and unique evolutionary flowering is termed the "Cambrian explosion," taking the name of the geological age in whose early part it occurred. But it was not as rapid as an explosion ...

A remarkable fossilized larva has been discovered by scientists with its brain and guts still intact. The fossilized creature ...

Focused on Cambrian fossils, the study reanimates a species long trapped in the pages of forgotten paleontology.

The Cambrian Explosion saw an incredible diversity of life emerge, including many major animal groups alive today. Among them were the chordates, to which vertebrates (animals with backbones ...

About 540 million years ago, our planet suddenly erupted with life, filling our oceans with a diversity of complex life. This is known as the Cambrian ...

This is an illustration of marine fossils that have existed since the Cambrian. Represented taxa include brachiopods, trilobites, ammonites, bivalves, and decapods. Disclaimer: AAAS and EurekAlert!

This stunning and unique evolutionary flowering is termed the "Cambrian explosion," taking the name of the geological age in whose early part it occurred. But it was not as rapid as an explosion ...