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Police Officers Keep Cool in the Heat With Air-Conditioned Bulletproof Vests

If you’ve ever seen police officers walking around in full gear during a heat wave, you’ve probably felt a little faint just looking at them.  Lucky for them, scientists from the Swiss Federal Laboratories for Materials Science and Technology (EMPA) have devised a new “smart” protective garment that cools down your body instead of keeping it heated [...]
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