Space Shuttle toilets have always been mounted on the floor, but you would not call them normal. The original shuttle toilet bowl featured a set of 1,200 rpm Waring blender blades positioned a brief 6 inches below the sitter's anatomy. The macerator would pulp the feces and tissue-meaning, if all went well, the paper, not the scrotal, variety-and fling it to the sides of a holding tank.
( Mary Roach )
[ Packing for Mars: The Curious ]
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