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Why Hasn't Anyone Thought of this Before?

March 21, 2014
Food scientists in China have developed color-coded smart tags that can be placed on the outside of any container to measure its life cycle. The researchers say that the smart tags will cut down on trash and prevent people from guessing whether their food is safe to eat.

The researchers tested the tags with milk, but they say the invention can be used for anything—even prescription drugs. Even better, they’re very cheap to produce, costing less than a penny for each tag....



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