There has to be alien life out there, but if there was an intelligent life much smarter than us out there in our galaxy we'd prob find them. I believe, although there is a good chance that there's intelligent life in our galaxy, we could be the smartest things in our galaxy, but in the universe there's billions of civilizations smarter than us, we can't even see the entire universe kus stuff 10 billions light years away looks like dust clouds even though their currently galaxy kus the speed of light is soo slow and it takes thousands of years to travel places, and if we actually traveled close to the speed of sound, what would seem like 5000 years on earth would feel like 5 years to the people in the ship, and your bones grow weak after a couple months in space and child birth is impossible, but mabye artificial gravity would help, also it is scientifically possible to travel foward and back in time, and there are worm holes all around us that we can manipulate, there are 11 dimensions too, if you don't believe me google this shit, i didn't find it on google i have read books and watched tv, most of the stuff i said are einstiens theories.