The worlds of the fantastical are full of recurring themes and strange ideas, and we love to find patterns in the chaos. Here are our 10 greatest lists from 2009.

Top 10 Greatest Mentally Ill Superheroes. You don't have to be crazy to put on a shiny costume and battle evil - but it doesn't hurt. Here's our list of the ten most awesomely insane superheroes. Ever.

The Greatest Inventions Nikola Tesla Never Created Inventor Nikola Tesla invented the radio, experimented with wireless electricity, and designed a death ray. In science fiction, his work goes even further. We list Tesla's greatest fictional inventions and the facts behind the fiction.

The 15 Dumbest Superhero Retcons Of All Time Superheroes can escape almost any trap... except for 50 years' worth of backstory that's dated, self-contradictory or gets in the way of a story. So what do you do? Reach for the retcon! Here are 15 examples of retcon fail.

The Most Badass Female Space Pilots Of All Time Some of the hottest hot-shot pilots in space opera are women. It's a longstanding tradition in science fiction to show women taking the controls of starships, space fighters and star-cruisers, and here are our favorite badass female cockpit jockeys.

10 Greatest Science Fiction TV Show Endings Ever With Battlestar Galactica rocking to an end, the show's producers promise a bravura conclusion that will knock our socks off. But it's got some stiff competition - here are science fiction television's greatest endings. Spoilers!

When the Future Expires - A Timeline Putting an expiration date on the future is risky. Take the Terminator franchise: The all-important "Judgment Day" — originally set in the "near future" of 1997 — has been pushed back twice already. Here's a timeline of future scenarios past their sell-by dates - and a few that will curdle soon.

Kick-Ass Scenes That Are In Trailers, But Aren't In The Movies Check out this Star Trek TV spot — notice something that wasn't in the movie? That's right: around 0:15, there's baby Spock, complete with teeny Vulcan ears! Why do studios throw cool scenes into trailers, then cut them out of the final movies? Here's a list.

Sex Robots Who Kill: Is Anything Deadlier? As soon as we have convincing(ish) androids and gynoids, we'll create pleasure-droids. And soon after that, those sex-machines will use their super-powerful thigh muscles to try and kill us. Here are 15 examples of the sexy robot death that awaits you in the future.

10 Reasons Not to Bring Someone Back from the Dead When you've got amazing technologies or strong magical powers, death doesn't have to have the final word. But is bringing the dead back to life always a good idea? We look the reasons it's better to say no to resurrection.

What Will Today's Cities Look Like in the Future? What will the New Yorks, Londons, and Tokyos of tomorrow look like? Will they be technological Edens, grim dystopias, or entirely obliterated? We look at science fiction's take on the future of today's cities to gauge our urban future.