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What do the symbols on the U.S. one-dollar bill mean? Why do feet stink? How do instant cameras work? Join Marshall Brain as he explores the science behind everything from microwave popcorn to metal detectors.

What do the symbols on the U.S. one-dollar bill mean? Why do feet stink? How do instant cameras work? Join Marshall Brain as he explores the science behind everything from microwave popcorn to metal detectors. Show more

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