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.
History and Geography are no longer boring and dry, and the material provides a wide variety of topics.
Laura Davidson, Teacher