Flail Chest. Flail chest describes a situation in which a portion of the rib cage is separated from the rest of the chest wall, usually due to a severe blunt trauma, such as a serious fall or a car accident.
The Moons of Saturn. Saturn has 52 known satellites as of 2008, 7 of which were discovered by the Voyager spacecraft. The largest and most interesting is Titan, which is 3600 miles in diameter and 922,000 miles from Saturn. It is the only satellite to have a thick atmosphere, and a surprisingly dense one, too: 1.6 atmospheres.
Saturn's rings span a great distance with the inner D ring approximately 6,700 kilometers from Saturn's cloud tops to the fringes of the E ring, 480,000 kilometers out. Surprisingly, most of the rings are only a few tens of meters thick with a total mass equivalent to a medium sized moon.