Viewpoint: Yes, recent evidence suggests that the Great Sphinx is much older than most scientists believe.

Viewpoint: No, the Great Sphinx was built about 4,500 years ago during the reign of the pharaoh Khafre, as has long been believed by most archaeologists and Egyptologists.

Rising from the Sahara in Egypt looms one of history's most perplexing mysteries. Its stone eyes stare out of an almost human face, surveying a land of ancient tombs and endless sand. For millennia, it has weathered the ravages of time and witnessed the rise and fall of civilizations. Yet, after all these hundreds of years, the Great Sphinx of Giza remains an enigma. Just when we believe we are about to solve...