When Mark Lehner was a teenager in the late 1960s, his parents introduced him to the writings of the famed clairvoyant Edgar Cayce. During one of his trances, Cayce, who died in 1945, saw that refugees from the lost city of Atlantis buried their secrets in a hall of records under the Sphinx and that the hall would be discovered before the end of the 20th century.
King Thutmose IV didn't build the Great Sphinx. He rediscovered it, hidden in the sand, and - according to legend - it made him king in return.
Evan Hadingham is senior science editor of the PBS series "Nova." Its "Riddles of the Sphinx" aired on January 19.