Evidence for a geologic trigger of the Cambrian Explosion

ScienceDaily: Earth Science News


Evidence for a geologic trigger of the Cambrian Explosion

Posted: 18 Apr 2012 10:14 AM PDT

The oceans teemed with life 600 million years ago, but the simple, soft-bodied creatures would have been hardly recognizable as the ancestors of nearly all animals on Earth today. Then something happened. Over several tens of millions of years — a relative blink of an eye in geologic terms — a burst of evolution led to a flurry of diversification and increasing complexity, including the expansion of multicellular organisms and the appearance of the first shells and skeletons.
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