Richard meets the owners of an abnormal humanoid skull allegedly discovered in Mexico in the 1930s and a researcher who has had the skull subjected to numerous tests including carbon-14 dating, and DNA in order to determine it's origin. Is it the skull of a badly deformed child? Is it a hoax? Is it the remains of an extraterrestrial? Is it a human-alien hybrid? An exo-biologist and a skeptic offer their perspectives on this most unusual relic.
