In the six hundredth year of Noah’s life, on the seventeenth day of the second month—on that day all the springs of the great deep burst forth, and the floodgates of the heavens were opened. 12 And rain fell on the earth forty days and forty nights.
Tests on the mineral found that about 1.5% of its weight is water. "That doesn't sound like much, but when you calculate the vast volumes of ringwoodite thought to exist in the deep Earth, the amount of water might be as high as that contained in all the world's oceans," Pearson told the Guardian. That amounts to more than one billion billion tonnes of water.
“The water locked into the mineral apatite in the Moon rocks studied has an isotopic signature very similar to that of the Earth and some carbonaceous chondrite meteorites,” says Barnes. “The remarkable consistency between the hydrogen composition of lunar samples and water-reservoirs of the Earth strongly suggests that there is a common origin for water in the Earth-Moon system.”