From a sheep ranch in Western Australia comes the oldest slice of Earth we know.
MORE: http://www.cnn.com/2014/02/24/world/oldest-earth-fragment/index.html?hpt=us_bn4
Friday, February 28, 20144.4 billion-year-old crystal is oldest piece of Earth
From a sheep ranch in Western Australia comes the oldest slice of Earth we know.
MORE: http://www.cnn.com/2014/02/24/world/oldest-earth-fragment/index.html?hpt=us_bn4 
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