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.
The activities embedded in the programs make the subjects more engaging for the students as well as the teacher.
Trent Perry, Teacher