UFO enthusiasts claimed that one of the raw images provided by NASA’s Mars Curiosity rover showed an object that appears to be a leg bone. According to UFO enthusiasts, the photo is clear proof of the existence of alien life on Mars.

The questionable photo was taken by the Curiosity rover on Sol 719 or on Aug. 14, 2014, in Earth time. In the photo, several rocks and other debris can be seen embedded in the Martian soil. One particular item that stood out in the photo was an elongated object that eerily resembled a leg bone. Its ends even looked like epiphyses or the sections of a bone where joints are formed.

A video analysis of the strange object in the photo was shared by the YouTube user WhatsUpInTheSky37. One of the commenters on the video noted that the soil in the area where the bone-like object was found appeared to have been disturbed. Based on the image, it looked like something was digging around in the area.

Since the photo was taken by Curiosity, the rover may have loosened up the soil as it was exploring the area.

After viewing the video, self-proclaimed UFO expert Scott Waring of ET Data Base noted that his wife, who works as a nurse, confirmed that the object really does look like a leg bone. Specifically, she said it resembled the bone found in the upper leg or thigh.

For Waring, the image snapped by Curiosity rover clearly showed extraterrestrials lived on Mars. If the object was really a bone, it is possible that the early inhabitants of Mars were bipedal.

This was not the first time that Waring spotted an object hinting at the existence of alien life on Mars. Through various photos provided by NASA, Waring previously saw various artifacts that he claimed to be of alien origin.

Since the size of the artifacts and other objects were small compared to their surroundings, Waring speculated that they may have been used or created by very short beings. He assumed that these being may have only been about several inches tall.

Sol 719 This image was taken by Mastcam: Right (MAST_RIGHT) onboard NASA's Mars rover Curiosity on Sol 719 (2014-08-14 21:49:28 UTC). Photo: NASA/JPL-Caltech/MSSS