[Geology2] Cambrian Explosion Had a Long Fuse

Cambrian Explosion Had a Long Fuse

> A new effort to date the early history of modern animals finds a lot of
> evolutionary dawdling.
>
> The last common ancestor of all living animals probably arose nearly 800
> million years ago, a multidisciplinary research team reports in the Nov. 25
> Science. From that common ancestry, various animal lineages diverged and
> evolved on their own paths.
>
> Yet the major animal groups living today didn't arise until roughly 200
> million years later, in an exuberant burst of forms preserved in fossils
> during what's called the Cambrian explosion.
>
> READ MORE:
http://ow.ly/7IsS3

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