A paleontological site discovered in the southwestern Chinese province of Yunnan has yielded more than 700 fossil specimens ...
The assemblage suggests that the ancestors of some of today's animal groups may have arisen before the famed Cambrian ...
The Cambrian is a geologic period of the Paleozoic Era, spanning approximately 539–485 million years ago, characterized by a major diversification of multicellular life known as the Cambrian explosion ...
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