#1: The Manhunters

How deadly are they? They destroyed all life within Space Sector 666 because of a "programming glitch." How big is a Space Sector? Unknown, although the entire universe is split into at least 3601 of them, and Final Crisis claims that there are "thousands of worlds" within Earth's sector. So let's just say that's a lot of… » 5/19/09 12:30pm 5/19/09 12:30pm

#5: Skynet/The Terminators

How deadly are they? They took over the Earth and are pretty much trying to destroy all human life, starting with a successful nuclear annihilation of three million people. You've seen The Terminator movies, right?
Who's responsible? The military. Sure, you could blame original creators Cyberdyne Systems, but I'm… » 5/19/09 12:30pm 5/19/09 12:30pm

#6: Sentinels (The Matrix)

How deadly are they? They took over the Earth and keep humans around only as batteries. Which, you know, is potentially an environmentally solution to the whole need for energy (Although they did start out with solar power.
Who's responsible? Humanity en masse. The robots that ended up taking over the world started out … » 5/19/09 12:30pm 5/19/09 12:30pm

#7: Sentinels (Marvel Comics)

How deadly are they? They almost eradicated the mutant race, killing millions in one afternoon's work by destroying the island of Genosha. There's also a much-visited future where the Sentinels have taken over the world and killed the X-Men and many other superheroes.
Who's responsible? Humanity's intolerance and fear. … » 5/19/09 12:30pm 5/19/09 12:30pm

Three of the Greediest Planet-Eating Bastards Ever Created

Now that we've all given up on any pretense at a New Year's diet, it's time to celebrate some of the hungriest people in science fiction: Those so hungry, they could eat an entire planet. Not for these fine folk, the questionable pleasures of a Burger King Whopper or espresso chocolate chip cookie or several; instead, … » 2/05/08 8:00am 2/05/08 8:00am