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Tuesday, December 2, 2008 |
Photo: India Basins Half a Billion Years Older Than ThoughtA study released in July 2008 found that the basin formed a billion years ago—up to 500 million years earlier than previously believed—lending support to the theory that Earth was completely covered in snow and ice about 700 million years ago. Image courtesy Joseph Meert
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ADVERTISEMENTNATIONAL GEOGRAPHIC'S PHOTO OF THE DAYPhoto and Headline Widget
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