On Dec. 25, 2004, a four foot wide atmospheric entry probe named Huygens separated from Cassini and began its 22-day journey to the surface of Titan. The largest of Saturn's 62 moons, Titan is the only celestial body in space besides Earth that features stable bodies of surface liquid. When Huygens landed on January 14, 2005, it discovered a world similar to the early days of Earth before life evolved. Drainage channels, lakes, erosions, dunes, rainstorms, all appear to constantly shape and impact Titan's surface. The major difference is that much of the liquid is composed of methane and ethane, not to mention a frigid surface temperature recorded by Huygens of - °F.