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Ancient Colorado river flowed backwards

( -- Geologists have found evidence that some 55 million years ago a river as big as the modern Colorado flowed through Arizona into Utah in the opposite direction from the present-day river. Writing in the October ...

dateOct 04, 2010 in Earth Sciences
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Paleo study shows how elevation may affect evolution

About 34 million years ago, global temperatures took a dive, causing a sudden wave of extinctions among European mammals. In North America, however, life went on largely unscathed. A new study explains why: The rise of the ...

dateJun 03, 2015 in Evolution
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