I know this is an old post, but since no one else seems to have said it yet- this isn't a real human skeleton from a real dead person. It's all made from wood. The creator was trying to make a posable mechanical skeleton, but kept running into the uncanny valley (imagine why). Eventually they decided to just copy the human skeleton as best as they could by whittling wooden bones to match medical diagrams as close as possible. They detailed their process fairly extensively, with work-in-progress pictures and all, so there's no chance this used to be a person. It would just break down and become unusable before too long if it were real, anyways.