By Jenna Iacurci Jun 13, 2014 11:33 AM EDT Scientists have discovered evidence of a vast water reservoir trapped hundreds of miles beneath the surface, capable of filling Earth's oceans three times over. Located 400 miles (660 km) beneath Earth's crust, this body of water is locked up in a blue mineral called ringwoodite that lies … Continue reading Vast Underwater Ocean Trapped Beneath Earth’s Crust