there is no definite proof but aliens are likely to exist
No
i believe in aliens because their is billions of planets in the universe that their could be aliens on a planet
It is not known for certain whether aliens, if they exist, require oxygen. Life as we know it on Earth relies on oxygen for respiration, but there may be forms of life in the universe that have evolved to utilize different elements or means for survival.
If there are aliens here and they procreated those "alien children" are no longer alien but earthlings like me and you and my dog blue. I know that does not answer your question but I thought it was interesting.
there is aliens that like to party
No. It wouldn't be possible.
Possibly. It has yet to be proved whether or not there are actually aliens out there. the universe is so wide and i growing constantly which is why it is very hard to know.
Into the Universe with Stephen Hawking - 2010 Aliens 1-1 is rated/received certificates of: Australia:G
... im thinking... Universe is big.
strange universal cities or countries
yes. we think other species are aliens because we dont know what they are. maybe aliens dont know about us and think we are aliens.
It's fun to pretend, but there is no proof and so there is no good reason to believe this. The universe is really big but that does not prove that aliens exist. After all, someone in the universe has to be the first, and there is no solid proof it isn't us. Aliens are real because we can't be the only life in the hole of the universe and some people think there are labs holding aliens.