The probe that made history by landing on a comet last year may have just hit another historic milestone. It could be the first part of human civilization to come into contact with extraterrestrial life. Philae was the first spacecraft to land on a comet, was dropped on to the surface of Comet 67P by its mothership, Rosetta, November last year.
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http://etearth.com/most-probably-alien-life-will-be-discovered-on-philae-comet/