These Scientists Say There Could Be Life on Rosetta's Comet

There could be extraterrestrial life on Comet 67P/Churyumov-Gerasimenko, the target of the European Space Agency's Rosetta orbiter. That's according to a couple of UK-based scientists who claim that features on the comet's surface could be explained by microorganisms beneath the crust. It's a radical view, and a controversial one, but astrobiologists Max Wallis from the University of Cardiff and Chandra Wickramasinghe, director of the Buckingham Center for Astrobiology, claim data from the Roset...