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Fast tilt

Fast tilt

作者:东门播  时间:2019-03-07 05:10:01  人气:

IT SEEMS that the Earth suddenly tilted on its axis by up to 20 degrees about 84 million years ago, tipping continent-loads of dinosaurs into new climate zones. Geologists have traced the slow wander of the Earth’s magnetic poles across its surface by examining the magnetic record laid down in lava. And generally,