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Interesting post and for my contribution I offer the idea that Pyramids have 'special powers of preservation'...now I have never tried this but have read in several places that if you make a pyramid to the correct scale and dimensions of those found in Egypt out of carboard or wood, or whatever, and place food inside it and a 'control' outside it, then the food inside the pyramid remains in a better state than the food outside. Also a blunt a razor blade will become sharpened. The pyramid must be aligned so its four points align with NSEW on the compass, if you get my drift.
I quote Mr B. I know it seems a bit farfetched, but maybe there's some truth in this.
Time to conduct an experiment