Fossils shed light on evolutionary origin of animals from single-cell ancestors

Thursday, December 22, 2011 - 14:01 in Paleontology & Archaeology

All life evolved from a single-celled universal common ancestor, and at various times in Earth history, single-celled organisms threw their lot in with each other to become larger and multicellular, resulting, for instance, in the riotous diversity of animals. However, fossil evidence of these major evolutionary transitions is extremely rare.

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