This is disturbing. Not only because it seems to indicate that all of those symbologists and experts on ancient aliens and so forth may have been off in their calculations, but because it will give ammunition to all those "scientists" and "archaeologists" and forth -- you know. The ones who are professors and such and all think they're so G-D smart and are so G-D proud of their "peer-reviewed journals" and all -- in their worldwide conspiracy to hinder heroes like Däniken and Downing and Tsoukalos from telling the world the truth. The public might be more inclined to listen to "scientists" when they perpetrate awful smears such as saying that not only are Tsoukalos' interpretation of ancient Mayan and Egyptian heiroglyphics dubious, but that there's no actual evidence that Tsoukalos can actually read any heiroglyphics.
OMG -- this could damage the credibility of the History Channel!! People might start to doubt the messages we've gotten from the Bible code! They could start to doubt perfectly obvious truths such as that the angels and demons in old paintings are actually aliens, no matter how many times Tsoukalos smirks in the direction of a camera and exclaims that it's perfectly obvious!
People might stop believing in astrology! People might start to wonder whether people built the pyramids in Egypt and Latin America all by themselves, with absolutely no help from extraterrestrials! Where would that leave us?!
I'm afraid! Afraid for myself, and for Dan Brown.