500-Million-Year-Old Embryos Fossilized in Rare Find

April 15, 2014 4:05 PM

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500-Million-Year-Old Embryos Fossilized in Rare Find

Tiny, spherical fossils found in southern China appear to be the embryos of a previously unknown animal.

The fossils come from the Cambrian, a period dating from 540 million to 485 million years ago and known for an explosion of diversity. Some of the organisms that appeared during the Cambrian, such as the bug-like trilobite, had exoskeletons and other hard parts that fossilized nicely. Others, includ...

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