Scientists might soon have a much easier time discovering every last nuance of other planets. Researchers have developed a quantum cascade laser (which sounds like an amazing sci-fi weapon, by the way) that can cover a very wide range of infrared wavelengths at the same time, making short work of detecting many chemicals. Astronomers, including study backer NASA, could use it to determine the contents of a planet's surface without touching it -- important when you'd rather not risk breaking samples, or when it's not possible to touch down on the surface in the first place.