ST Scientists Discover Massive 'Ocean' Near Earth's Core The transition zone's high water content has far-reaching consequences (Representational Image) 40 Scientists have discovered a reservoir of water three times the volume of all the oceans beneath the Earth's surface, according to an international study. The water has been found between the transition zone of the Earth's upper and lower mantle. The research team analyzed a rate diamond formed 660 meters below the Earth's surface using techniques including Raman spectroscopy and FTIR spectrometry, ANI reported. The study confirmed something that for a long time it was just a theory, namely that ocean water accompanies subducting slabs and thus enters the transition zone. This means...