New forensic techniques are radically altering our understanding of the past, and helping to resolve mysteries about the lives of some of the greatest figures in history. In this documentary a  leading expert applies modern forensic techniques to re-examine the myths and mysteries that have fascinated us for centuries. Dr Vassil Dobrev sets out to discover the truth about the Sphinx. Does it really represent the pharaoh Khafre? Using scientific techniques, Vassil finds a different explanation. That the Sphinx was created by a by a pharaoh that history forgot: Djedefre. TV-PG