Ok, there is a theory out there I read up on years ago that kind of make sense. Hopefully someone can reaffirm it. Basically, if there was alien life out there, we would have encountered them already. Consider this, since there is billions habitable planets that could have supported life before earth. If there was one capable of traveling beyond light speed they would have visited our universe at this point. Overall, even planets with intelligent life forms beyond ours are incapable of interstellar travel.Just a theory to consider.
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