Dr. Robert Schoch, who earned his Ph.D. in geology and geophysics at Yale University, has been a full-time faculty member of the College of General Studies at Boston University since 1984. He became world famous in the early 1990's as the first mainstream geologist to support the notion that the Great Sphinx of Giza may be much older than the dynastic civilization of ancient Egypt and his evidence and arguments continue to fuel debate around this highly-charged subject.