The Ediacaran, an era that ended about 540 million years ago, is considered the prelude to the Cambrian explosion, a period ...

A fossil deposit in Yunnan, China, dating back 546–539 million years, shows that diverse, complex animals thrived well before the Cambrian explosion. The Jiangchuan Biota includes early deuterostomes, ...

For decades, scientists have sought to explain the so-called "Cambrian Explosion," a pivotal period over 500 million years ago when a remarkable diversity of animal life appeared in the fossil record.