The Se­cret Ocean Un­der the Earth

iD magazine - - Contents -

A sur­pris­ing find 400 miles be­neath our feet

The sum of all the water re­serves of Earth’s sur­face to­tals some­where in the neigh­bor­hood of 330 mil­lion cu­bic miles. The oceans cover ap­prox­i­mately 71% of Earth’s sur­face. Water as we know it ex­ists in three states in our at­mos­phere: solid like ice, liq­uid, or gaseous like va­por. But in the in­te­rior of the planet it oc­curs in yet another form…

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