15. Alien skeleton
Conspiracy theorists reckon this shot is proof that aliens once roamed Mars. Their case, on the surface, appears to be strong: a head and torso can be clearly made out, as can a pair of arms. But who knows what happened to the “skeleton”’s legs?
14. Star Wars spaceship
This photo appears to have captured a downed Destroyer in the desolate Martian landscape, which seems crazy given that Star Wars is fictional – but hey, the camera never lies, right? The picture was taken by NASA’s Curiosity rover, and UFO experts have been totally captivated by it.