Saturn research: The Cassini Space Mission reaps bonanza of scientific information, data, photos, but there is also a price to be paid: There is 72 pounds of plutonium on board. Michio’s guests are astronomer Ken Croswell, author of many books including Magnificent Mars and Magnificent Universe, and Bruce Ganyon, of Global Network Against Weapons and Nuclear Power in Space. Also: World Health Organization reports environmental pollution is killing hundreds of thousands of young children in Europe every year; Koala Bear faces extinction due to human development; The Aral Sea, the largest salt water lake on earth, may also dissapear because of human development; Beam me up Scotty: Is quantum teleportation possible? Scientists at 2 institutions successfully "zapped" an atom across empty space.