All of the water on the Earth, gathered together, looks like just a tiny marble. The Jovian moon Europa has 2-3 times as much. Scientists think that beneath an icy surface lies an ocean 80 to 170 kilometers deep.
But it will do us no good. We are forbidden to land on Europa.
Link | Image: Kevin Hand, Jack Cook and Howard Perlman.
I agree with Edward, and I don't believe that their theory to be very accurate..
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This is only a measurement of Earth's free water. How much additional water is captured by living organisms? How much in our atmosphere? How much in mineral hydrates?
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