Since we haven't actually discovered any aliens yet, we do not know.
However scientists do believe that due to there being billions of galaxies out there, there must be another planet like earth with life on it.
Humangasaur
Apparently, Joe is an alien.
Alien is a Swedish rock band formed in 1986. The members of the band are; Tony Borg, Jimmy Wandroph, Toby Tarrach, and Ken Sandin. Their biggest single was Only One Woman.
THE best alien of ben-10 ultimate alien is alien x.
Depends on which type of alien it is. ET alien? Super 8 Alien, Independence Day Alien?, or is it Alien 1-2-3 Series Alien?
Alien.
Alien , Aliens , Alien 3 and Alien Resurrection .
Probably the biggest is that it depicts the Earth has having been created entirely by an alien race. This tends to upset those that believe in Creationism.
There are 4 alien films: Alien, Aliens, Alien3, Alien resurrection
Alien x is an alien which can travel backin time.... that's all i know about Alien X.
Alien X
queen alien is the best