The Shape of Life Season 1 Episode 7 Explosion of Life ( Air Date ) Genre Documentary category. Overview "In the 4.5 billion year history of Earth, a mere 10 million years seems rather insignificant, the equivalent of two months in the life of a 75 year-old man. Yet, during a 10 to 20 million year stretch of time, beginning about 540 million years ago, life evolved at an explosive rate. Scientists call the period the "Cambrian Explosion."".
The Shape of Life Season 1 Episode 7 Explosion of Life
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