Humankind is attempting to land a washing-machine-sized bit of science equipment named Philae onto Comet 67P/Churyumov-Gerasimenko today. Think about how awesome that is!
I love space exploration, and this makes me so happy. Not only because we are doing it, but because of how many unknowns there are to do it. You can watch the landing attempt LIVE, view some of the breathtaking photos of the comet beamed back by the Rosetta orbiter, and read all about the mission. Godspeed, Philae!