I understand that there will always be debates regardless of how solid the evidences are but some claims are far fetched. I think the pharaohs headgear doesn't reflect the actual shape of their head, also, I think most people who write in this field always make far out claims that almost discredit their more credible claims. Reading von daniken's book however will amaze anyone who is willing to reflect on them, it seems there is an ET connection in the distant past of our history, or maybe humans were just very advanced till a point when a global catastrophe reset the state of things.