FYI, Earth holds only 2% of the water in the solar system.
If this is a surprise, maybe you don’t know as much as you thought. 🙃 
Discussion
Never thought about it, but now that I have that’s actually a lot!
Wen Ganymede ice mining expeditions? I feel like I was born a few centuries too soon.
Living on Ganymede with D-D fusion power is destiny for Earthlings.
It’s hard to imagine a giant ocean under a layer of ice.
But only Earth and likely Europa have liquid water.
Didn’t the Galileo probe determine a subsurface ocean of liquid water on Ganymede?
150km of surface ice crust, then below that a liquid water layer that is 100km thick.
Try using some of the water on the other "worlds" lol
which planet has most beer reserve 🙃
