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Here's What Brian Greene's Gut Is Telling Him About Intelligent Life in the Universe
Is there intelligent life out there in the universe? That question is more complicated than you might imagine. What constitutes intelligent life? How does it come to be? How many totally random happenstances occurred just so we could exist, and could those happenstances occur again elsewhere out there? Why, as Fermi so astutely asked, haven't intelligent beings communicated with us yet? Theoretical physicist Brian Greene, a Columbia University professor and chairman of the World Science Festival, shoots from the hip and says, "Yeah, I think there’s probably alien life out there. Probably intelligent life too."