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Is Extraterrestrial Life More a Dream Than a Real Possibility?

There is no getting around the fact that a lot of people would be very excited if extraterrestrial life existed. But while plenty of scientists are working hard to find it, others aren't as convinced—and a team of Princeton physicists has gone as far as publishing an academic article explaining exactly why they think… » 4/27/12 4:27am 4/27/12 4:27am