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Water covers about 70 percent of the Earth's surface, but where did it come from?


Possible sources Internal sources. Gradual "dehydration melting"—leakage of water stored in hydrate minerals of Earth's rocks—could have formed a portion of its water. Water may also have come from volcanism: water vapor in the atmosphere that originated in volcanic eruptions may have condensed to form rain, slowly filling Earth's oceanic basins.


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If water just keeps getting recycled by a closed system on Earth, how did it get here in the first place? Where did the cycle begin? Hosted by: Reid Reimers ----- Support SciShow by becoming a ...


Water covers over 70% of the Earth, cycling from the oceans and rivers to the clouds and back again. It even makes up about 60% of our bodies. But in the rest of the solar system, liquid water is almost impossible to find. So how did our planet end up with so much of this substance? And where did it


Earth's water may have originated from both asteroidal material and gas left over from the formation of the Sun. Where did Earth's water come from? Scientists have a new theory


“Planet Earth makes its own water from scratch deep in the mantle” was the article headline in the January 27, 2017, New Scientist’s Daily News.1 It is ironic that secularist scientists are still seeking to explain where the Earth’s water came from.


Where did water on Earth come from? I know of the cycle of water but where did the water come from originally and what period of Earth's history did it come to? Please direct me to links if you need to.


Not all of Earth's water came from asteroids and comets. A significant and early source for may have been the solar nebula itself, according to a new study.


The gases which formed the Earth's atmosphere -- and probably its oceans -- did not come from inside the Earth but from outer space, according to a new study.