Exactly who designed and built the mammoth Egyptian monument known as the Great Sphinx of Giza? Whose image is the half-man, half-lion meant to represent? This provocative and intriguing documentary from the "Nova" series explores the archeological evidence and conducts fresh experiments designed to shed more light upon─if not solve─the famous riddles connected to the centuries-old icon. 60 min. Widescreen; Soundtracks: English, DVS.