[on the evidence that ordinary humans built the Pyramids:] "All the
skeletons of the men and women show signs of stress in their backs,
because people were involved in moving heavy stuff. We determined
through X-rays that someone had syphilis, and we found evidence of
brain surgery on a workman, who lived for two years afterwards. The
ancients even had emergency treatment for workers on site, because we
discovered that they were fixing broken bones and even amputating legs
that had been crushed by a falling stone."