New findings are being reported about one of Saturn's moons-- Hyperion. The odd non-spherical moon is pockmarked with deep craters, giving it a sponge-like appearance. Its craters are thought to be preserved by the moon's porous surface, which also contains a "dark red gunk." For more, visit Space.com(1).

1. http://www.space.com/scienceastronomy/070704_sponge_moon.html