Quote:
Originally Posted by Xist
I really do not think that the pyramids are a good example. Mountains are naturally occurring and generally do not fall down, either.
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Pyramid inclination angle is 43.3 degree; same as sand in hourglass. They generally do not fall unless damaged by external forces or as in FB picture above taken apart for building material.
EDIT: rreading more on bent pyramid it appears the angle on it was changed during construction from original 54deg to 43 to prevent collapse