Aliens, Predators, Martians and others who don't come in peace
By Geoff Berkshire, Metromix
They've traveled very far, they're up to no good and they won't give up easy. Evil aliens are a sci-fi staple, but which ones have made the most indelible impressions over the years?
As the release of "Predators" brings one of the biggest alien baddies back to the big screen, we're taking a look back at 10 of the all-time greatest evil movie aliens.
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