Since its debut, "Star Trek" has introduced decades worth of new characters, locations, and alien races, but only a few disappeared from one day to the next.

Add Yahoo as a preferred source to see more of our stories on Google. It's not just iconic characters like Kirk, Spock, and Janeway that have made "Star Trek" one of the best science fiction ...

The Marvel Universe wouldn't be as large and expansive without the alien worlds that populate it. All sorts of alien races ...

Alien Racers is an animated television show about racing and is aimed for kids ages 7 and above. It originally aired on Fox's FoxBox in 2005. It currently airs in Canada on Teletoon.