Does Saturn's 'Death Star' Moon Harbor A Hidden Ocean?

It's not the prettiest thing in the solar system, nor is it the most interesting. But Mimas — a pockmarked moon in orbit around Saturn — does exhibit a rather strange wobble. A team of astronomers say there can only be one of two explanations: either it's harbouring a subterranean ocean or it has an irregularly shaped… »10/17/14 1:20pm10/17/14 1:20pm