Not my favorite conspiracy theory, but I have an affinity for the "Face on Mars". I worked on image processing software for Mars Global Surveyor and Mars Odysse

Not my favorite conspiracy theory, but I have an affinity for the "Face on Mars". I worked on image processing software for Mars Global Surveyor and Mars Odyssey. I was probably the first person to see some of the images taken. I foolishly got into a few debates with conspiracy nuts about the "face," while showing them the location at higher resolution, from different angles, etc. I learned that one should just back away from them slowly until it's safe to run. I had a similar experience working on the Lunar Reconnaissance Orbiter and the "we never landed on the moon" nutjobs, but the Mars people are far crazier.