Like the pirate code, expiration dates are more of a rough guideline for when food might go bad. But a new
edible sensor made from silk and gold leaf takes the guesswork out of whether something is safe to eat.
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Source: http://feeds.gawker.com/~r/gizmodo/full/~3/fSFroplXOlI/edible-sensors-let-you-know-if-your-food-is-spoiled
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