Clearly visible in the night sky, Mars has always played a mysterious role in the human psyche. A planet so close, and yet so far and utterly alien, it has fed our imagination for centuries. From video games to movies, many visionaries have explored the almost sinister side to Mars - the part we're all a little bit nervous about. Maybe we're looking a little bit too far away in the solar system - maybe they're right under our noses.
The fear of our alien overlords residing on a planet so close by seems to have been jump-started by a man named Christian Huygens, who in 1659 discovered an incredibly creepy feature on the surface of the red planet. Named Syrtis Major, this so-called geographical anomaly fed into public hysteria over an imminent attack, a hysteria that hasn't really died down since.