Russian tycoon Yuri Milner is putting $100 million into a 10-year quest to find alien life by listening in on the universe with the most sensitive technology available. Stephen Hawking is an adviser & the inspiration behind it, Yuri tells us. The project is only about listening for alien signals not sending out messages as caution dictates. Finding out if we are alone in the universe is a big question for humanity. If life has no back up then the responsibility to cherish our world is even more enormous than we thought and questions of colonisation of the Moon or Mars arise. If we are not alone, then that would be our biggest challenge yet. All the raw data from the quest will be made available to academics and the public alike, and as no govts are involved, if they find alien life, we will know.