Saturn's large moon Titan, already Earth-like with its thick atmosphere and rich organic stew of chemicals, also harbors a liquid water ocean beneath its crust, new findings from NASA's Cassini spacecraft show. Gravity maps painstakingly pieced together from data collected over five years revealed Titan's shape changes by about 10 meters (about 33 feet) due to Saturn's gravitational tugs, a squishiness that is best explained by a liquid body of water relatively close to the surface. Read more
