MrMophoto wrote:
I read somewhere another reason "extraterrestrials" haven't made it to earth (if you don't believe they have) is that any "intelligent" creature that has advanced to the point where they possibly could travel that far has probably destroyed themselves or their own planet. Not a very uplifting thought, but it makes sense in a way.
One thing humans will never have to worry about is being attacked by people from other planets. There are none.