High-res photos coming back from the Mars Curiosity rover are fodder for all manner of UFOlogists and theory nuts. Here we have an image which is believed to show a human thigh bone on the surface.

Boyd Bushman was a a scientist with Lockheed Martin. Before his death, he confessed he worked at Area 51 and talked about interactions with aliens. He also claimed more than a dozen aliens currently work in the US government. Although one of his photos was debunked as picturing a toy from Walmart, there are those that find validity in his interview.

Another Curiosity rover photo piqued the interest of a UFO blogger in Belgium. This guy claims a Martian rock has a sideways petroglyph on it, similar to hieroglyphics found on columns in ancient Egypt.

X-37B was the name of the unmanned AF space plane that blasted into orbit for two years, with purpose classified. Most think its mission had to do with national security, but others believe X-37B was searching for, or communicating with, aliens.

UFOlogists claim weird things have appeared in photos and video feeds from the International Space Station, like this strange object above. NASA isn't saying a word, and astronauts will say light and random particles in space can play tricks on the eyes and photography equipment.

Philae, a Euro lander, had just made touchdown on a comet when an anonymous individual sent an email claiming the comet was a ruse. The Rosetta mission was about making contact with aliens, and the "rock" was actually a secret spacecraft or base in disguise. You can listen to the comet's "song", which some believe is a specialized transmission.

NASA's solar observatory will photograph flares, and according to some, strange anomalies. UFO Sightings Daily claims this image shows a craft orbiting the sun.

This photo is purported to show a man messing with the Mars Curiosity rover on the surface of the red planet. He's got air tanks but no helmet, and his hair is seen blowing in the wind. It's believed that either the rover is on Earth, or Mars may be more habitable than the public knows.

NASA apparently has a video of this thing on Mars moving, then suddenly disappearing. The video is classified, but a gif can be seen of the "bunny ear" waving on their site. UFOlogists claim it's obviously a life form but now NASA is stating it's "just equipment".

According to some, a secret doorway on the moon exists, which at times can be seen wide open through telescopes and on some NASA Apollo moon photos.