EarthSphere
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EarthSphere

Our Common Ancestors

A Tale of the Cryogenian

Published in The EarthSphere Blog

View from Below the Cryogenian Ice (by ArcheanArt)

Prologue

Our last article in the Forgotten Origins series discussed the Cryogenian Period from 720 to 635 million years ago. During this interval, our common animal ancestors first appeared. Was the Cryogenian a dividing line between single-cell life and complex multicellular organisms?

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