Do we need to prove Aliens exist? Some people are pretty much convinced that there’s life out there, and I mean just do the math, what proof do we really need that we’re not alone? Maybe I should say that lack of evidence doesn’t mean we’re alone. I’m guessing from the math, that intelligent civilizations originating from other planets, have existed for millions of years, if not billions of years. I think those figures can be calculated if you take some things into consideration, for instance the rate of suitable planetary formation. In the sense that I’m talking about, life in the Universe would start off quite slowly and I guess in the phase of the Universe we’re at now, would begin to explode with life. I won’t be surprised if I get attacked for this theory, but I would appreciate any constructive criticism.