We all may prefer the goldilocks zone - not too hot, not too cold. But most of the universe is bitterly cold. We can learn a lot about it if we're willing to brave a temperature drop.
A chilly Arctic island is the closest thing to Mars-on-Earth for scientists who want to go to the Red Planet. Meanwhile, the ice sheet at the South Pole is ideal for catching neutrinos – ghostly particles that may reveal secrets about the nature of the universe.
Comet ISON is comet ice-off after its passage close to the Sun, but it’s still giving us the word on solar system’s earliest years.