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Tuesday, July 19, 2011

How Earth has come to be so hot


 Half of the extraordinary heat of the Earth that erupts on its surface volcanically and drives the titanic motions of the continents is due to radioactivity, scientists find.

This new discovery shows that the planet still retains an extraordinary amount of heat it had from its primordial days.

http://bit.ly/nOQMZd

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