The current issue (#2) of Phenomena Magazine has a feature on this. I'd love to read more indepth reports on the sonar testing and results.
Originally posted by IKnowNothing
Wasn't it said that a library was under the sphinx paw? If there was such a back entrance, buried or caved in, I believe that alot of things would have been destroyed, the reason being, there is evidence on the sphinx that it has been through floods. I remember watching this on the History Channel. But I think it would fascinating nonetheless to figure out more about the history of the ancients.