View Full Version : Where Are All the Aliens?

2013-Jun-20, 10:00 PM
Consider this. The Universe is enormous. There are as many as four-hundred billion stars in our galaxy: the Milky Way. And there are more than one-hundred-and-seventy billion galaxies in the observable Universe. Most of those stars have planets, and many of those planets have got to contain useful minerals and fall within their starís habitable [...]

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