On August 14, 2014, the MastCam camera from the Curiosity rover made such an interesting picture that it immediately attracted the attention of the public, especially those who have long argued that “not everything is clean” on Mars and that living beings lived or live there. The fact is that one of the stones in this photo is strikingly similar to the thigh bone of some living creature.
Seeing interest in the image rising in a surge, NASA officials released an official explanation on August 21, calling the strange bone just an unusual stone.
NASA officials said that while “this Martian rock may look like a thighbone,” it is not the fossilized remains of a mysterious Martian.”“The mission's science team believes that its shape is most likely due to wind erosion or water.”
The Curiosity rover has found evidence that Mars was a habitable place in the distant past, but there is no evidence that creatures large enough to leave such a bone existed on the Red Planet.
"If life existed on Mars, scientists expect it to be small, simple life forms called microbes," NASA officials said in the photo description. “Mars likely never had enough oxygen in the atmosphere and elsewhere to support more complex organisms. So the large fossils are incredible for Mars."