A big whiff of a recently — and thoroughly — used bathroom makes it easy to see why many thought the stink of human excrement was the cause of widespread disease in places where adequate sewage systems didn’t exist.
They were wrong, but — let’s face it — at least one, huge reason we’re thankful for toilets is the ability to flush and forget.
Discover when humans made a movement for change in this episode of It’s Okay To Be Smart.
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