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Latest Francis A. Macdonald Stories

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2010-03-05 07:33:29

Scientists find signs of 'snowball Earth' amidst early animal evolution Geologists have found evidence that sea ice extended to the equator 716.5 million years ago, bringing new precision to a "snowball Earth" event long suspected to have taken place around that time. Led by scientists at Harvard University, the team reports on its work this week in the journal Science. The new findings -- based on an analysis of ancient tropical rocks that are now found in remote northwestern Canada --...