It could be the brightest comet of our lifetimes, and no, it's not Kohoutek. It's ISON and it tops the list of Smithsonian's 5 Science Stories to Watch in 2013: "Astronomers are predicting that when it passes by us and closely orbits the sun in November and December of 2013, it could be the astronomical sight of our lifetime." We'll see. Also on the list: Drilling into Lake Vostok; algae fuel; Big Bang data; and supercomputers in medicine.
