Where's the ice: 3 surprising comet facts we've already learned from Rosetta

Comet Scientists Rosetta Facts
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Today, after 10 years of space travel, the Rosetta explorer became the first to orbit a comet. The best is yet to come - the scientists behind the satellite are preparing to land a harpoon-like probe on the surface this November. Yet new information is already pouring in. What scientists have discovered is already starting to transform our understanding of Rosetta's target comet, 67P/Churyumov-Gerasimenko (C-G for short), and cometary science ( via popularmechanics.com ).

Here are three surprising facts we've already learned: