The great recycler -- planet Earth

In the current edition of leading science journal Nature, an international team of researchers publishes proof that the Earth recycles portions of its own crust, driving it deep down into the mantle of the planet and then bringing it back to the surface billions of years later.

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<p><a href="http://www.physorg.com/news100591273.html">The great recycler -- planet Earth</a></p> <p>In the current edition of leading science journal <i>Nature</i>, an international team of researchers publishes proof that the Earth recycles portions of its own crust, driving it deep down into the mantle of the planet and then bringing it back to the surface billions of years later.</p>