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The Ice Age Giants
Scientists have discovered the fossil of a primitive woolly rhino in Tibet. The discovery suggests that some giant mammals first evolved there before the beginning of the Ice Age.
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The new evidence sets up an alternative scenario: the harsh winters of the rising Tibetan Plateau may have provided the initial step toward cold-adaptation for several successful members of the late Pleistocene mammoth fauna in Europe, Asia, and to a lesser extent, North America.
http://www.astrobio.net/pressrelease/4208/the-ice-age-giants