Earth Takes A Beating
Posted by DA Morgan on Jul 25, 2002 at 12:07
The first convincing evidence that the Earth was bombarded by a devastating and prolonged storm of meteoroids and asteroids four billion years ago has been found in the Earth's oldest rocks.
The British and Australian researchers say there is no other conceivable explanation for new-found traces of an isotope, or form, of tungsten in 3.7-billion-year-old rocks from Greenland and Canada.
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