"[W]e observe a dramatical stop of the technology. ...[T]he variation of the pyramids' volume with time... from the invention by Djoser to the Cheops pyramid, that is ...within 60 years, we have an increase in the volumes ...optimum by Cheops and Chephren, and then a dramatic plunge... of the volume ...by Mykerinos, and the others are ridiculously small. What happened?"