The Cydonia face on Mars has been a long-standing debate/conspiracy. Scientists claim that the face on Mars is a result of natural erosion, and a trick of the light. But we haven't been there, and this was long before Mars probes...so how did we know that? Now, add to that: other scientists created the Starburst Pixel Interleaving Technique, just to scan the face further, and revealed that is was bilaterally symetrical, including definable eyes and headgear, which makes it even more unlikely that it was "natural erosion"
OK...now, make it weirder...the Russians sent 2 probes to study Phobos (one of the moons of Mars). Mostly, this is because, due to it's odd orbital acceleration, it suggests that it's either hollow or artificial (creepy!). One probe was 'lost in route' and the second was 'destroyed by a meteorite'. However...before the second one's destruction, it DID manage to relay back a few photos, including ones showing long shadows on the surface of mars, from unknown objects. The last photo sent has NEVER BEEN RELEASED, and reportedly contains "classified info".
Now, dig this...my favorite part: 1992, NASA sent up their 'mars observer', right? NASA denied that the Cydonia region was to be mapped. However, lobbyists and congressional pressure made NASA include it. Then, just before orbital insertion, the observer "ceased operating". More than one person has posited that it actually worked just fine, but the NASA wouldn't release the photos, or something...this was the chance that the region would finally be revealed, after all.
That whole region has odd things...the D&M Pyramid is in the Cydonia region, a five sided pyramid with very exact proportions; another case for building, not natural erosion. There are mathematical proportions and relations that involve them, etc. This IS conspiracy theory, though, so some of them get a little strained. ;)
That got me into crop circles again. I love crop circles. Just wild stuff. It's odd that someone so adamant about facts is so fascinated by conspiracy theory and phenomenon, but I am. I guess it's because they are fun, and in the case of crop circles, there's at least something actually THERE. I'm not saying that I believe they are created by aliens or something...we don't have nearly enough evidence to say one way or the other. But they ARE pretty nifty. I mean, hell, dig this one (my fellow Discordians should LOVE it).
Anyway, I'm declaring today to be Crackpot Conspiracy Day, so your job is to post here any conspiracy theory that you particularly like. If there's one you want to know more about, let me know...I collect the damn things. Just be prepared to get comfy if you ask me about the Kennedy Assassination...it might take me a couple days to type it all out...;)