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Curvy mountain belts

Mountain belts on Earth are most commonly formed by collision of one or more tectonic plates. The process of collision, uplift, and subsequent erosion of long mountain belts often produces profound global effects, including ...

dateJun 29, 2012 in Earth Sciences
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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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Mystery of monarch migration takes new turn

During the fall, hundreds of millions of monarch butterflies living in eastern North America fly up to 1,500 miles to the volcanic forests of Mexico to spend the winter, while monarchs west of the Rocky Mountains fly to the ...

dateMay 31, 2012 in Plants & Animals
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