Earth was young & violent; Mars was wet; and our earliest ancestor was thriving. "The implications are staggering!" http://www.theatlantic.com/science/archive/2016/08/the-worlds-oldest-fossils-are-37-billion-years-old/498056/ …
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Earth was young & violent; Mars was wet; and our earliest ancestor was thriving. "The implications are staggering!" http://www.theatlantic.com/science/archive/2016/08/the-worlds-oldest-fossils-are-37-billion-years-old/498056/ …