Early tomorrow morning, November 12, the European Space Agency will attempt to land on comet 67P. The Rosetta spacecraft, which has spent the last 10 years chasing down comet 67P, will release its Philae lander -- and, if everything goes to plan, it will touch down on the comet about seven hours later. It's an exceedingly complex maneuver, but if it's successful it will be the first time that humankind has ever landed on a comet, which would tell us a lot about the formation of the Solar System and maybe the genesis of life itself.