UFO watchers have found a bone, which appears to be that of a thigh, on the Mars. The rover captured the image on August 14, according to UFO blogger.

No NASA scientist has commented about it but the news has been gone viral on social networks. The bone was seen in one of the photos that were just sent by NASA's Mars Curiosity Rover. The rover has been examining the

Red Planet for the last two years. It is newest in a string of fossilized animals and other mysterious facts that bloggers have reported. Curiosity has been on Mars since August 6, 2012, and it will complete its first Martian year -- 687 Earth days -- on June 24.

These sightings contain an iguana, a cat, a dinosaur spine, two dinosaurs, a mysterious light, a toy boat, a half-human and half-goat face and a rock that came from one picture to the next when the rover was not on the move. Firstly, NASA itself was puzzled by that one but the rock changed its position when the rover turned in place and pressed the rock.

The fact can't be denied that it is an object that is clearly seen in the photos. This might give strength to the view that there could be some living creatures on the planet Mars. However, scientists have not commented on the topic.

NASA scientists will take some time to analyze the picture in detail and to find out about the nature of bone-like object.

Mars One mission is planning to take humans on one-way trip to Mars. Mars One has raised expectations across the world that humans would colonize the planet in near future.

Many people have signed up for one-way travel to planet Mars.