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 ...

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 ...

Twenty million years after the Cambrian explosion, something lethal wiped out almost half of all sea life in the world. For years, it was believed that the mass death event was caused by low ...