Laboratory tests in Peru have found that both of the unusual body parts are comprised of both skin and bone. After x-rays of the skull, they concluded that they could not have come from a human being. They came to the same conclusion about the unusual hand. The x-rays clearly show that the fingers inside the hand are comprised of six bones which mean that it cannot have come from a human being as humans only have three bones in each finger.
Now that most people have been assured that the artifacts are genuine there has been a great deal of speculation about where they could have come from. Some people have suggested that the skull and the hand could have been left on Earth by an alien visitor to the planet. Others have suggested that the artifact might come from a form of ancient humanoid. This theory has a certain amount of credibility as the remains of extinct forms of ancient humanoids have been discovered in Peru before. It is hoped that the mystery will be solved in the early part of 2017 when the two body parts will be sent to a specialist laboratory in the United States for radiocarbon and DNA testing.