http://www.space.com/28807-jupiter-moon-ganymede-salty-ocean.html
Ganymede, Jupiter’s largest moon, has a vast underground ocean of salty water, NASA scientists announced Thursday (March 12). The ocean on Ganymede was discovered with the Hubble Space Telescope.
I played this game 3 or 4 times with my grade 4 son. He said he would enjoy it more…
Brad