The Big Sphinx is the oldest monumental statue on Earth, a formidable stone monster with a height of a six-story house and a length of a whole block. Only the Great Pyramids, whose peace he has guarded for many millennia, can argue with him with age, grandeur and mystery. Famous researchers of Ancient Egypt Robert Buvel and Graham Hancock have long been engaged in a thorough study of the mysterious monument and came to sensational conclusions about its true purpose. In addition, their research allows us to shed light on a mysterious period in the history of mankind, when, after the retreat of the waters of the Flood, humanity suddenly received an incredible impetus in development, which ultimately led to the creation of modern civilization.