Pop Culture's Best Aliens

Fox Mulder isn't the only one who wants to believe in real-live aliens living among us. We may lack hard evidence, but fictional alien characters have invaded mainstream pop culture. From benign visitors like the Coneheads to god-like superheroes like Martian Manhunter, Superman, and Thor, who protect and serve their new earthling families, the range is vast. Then there's hilarious Stitch, evil Invader Zim, and level-headed Spock. These movie and TV aliens hold a mirror up to human beings, forcing us to confront our own humanity. Vote up your favorite fictional alien friend from the list below and share your thoughts in the comment section.