*It is conceivable that a major weather change in Egypt could
result in sufficient drying of the pyramids over the course of a few decades
(or centuries) so as to decrease the RF losses sufficiently to permit successful
probing of the interiors bu this radio-wave technique. Artificially drying
the pyramids would be novel but is clearly not practical. The pyramid of
Chephren, weighing as it does about 1010 lb, contains about
100 million gallons of water!