Add Yahoo as a preferred source to see more of our stories on Google. TV has taught us many important lessons about aliens. They are either here to observe us, replace us, eat our cats, or gently ...

One day, probably far off in the very distant future, if astronomers are correct in their assumptions about the vastness of space, Earth will be visited by intelligent beings from another planet.

Bring up aliens and a lot of people will scoff. But not everyone is laughing. Around the turn of the century, 3.8 million people banded together in a real-time search for aliens — with screensavers.