Well, I haven’t seen this documentary, but I read Hancock’s book years ago disputing the aging of the Sphinx and it was not very convincing at all. Lots of arguments based on pure speculation and ignoring all the contrary evidence and much simpler explanations for the “mysteries” he was trying to solve. So I haven’t been much interested in his theories after seeing how poor his thinking and methodology actually are once you scratch below the surface of the sensational things he says on tv.
Geologist Robert Schoch, Boston University PhD., has determined that the Sphinx is WAY older that what Egyptologists tell us— possibly as much as 10,000 years old. Schoch is totally legit.