Friday, July 9, 2010

Scientists hunt for signs of earliest life on Earth
[ Fri, 9 Jul 2010 14:34:02 GMT ]

Fossilized ripple marks from the 2.9 billion years old Pongola Supergroup rock in South Africa. These ripple marks record the interference of microbial life with water currents. Studies show that such ripples form over the course of a year in a storm-dominated, moderate climate zone.No one knows when the very first life on Earth appeared though what little evidence scientists have indicates that life was present not very long after our planet formed.


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