'Fear Detector' Being Developed That Will Be Able to Sniff Out Terrorists

A device that smells human fear is being developed by British scientists and could soon be sniffing out anxious terrorists.
The technology relies on recognising a pheromone - or scent signal - produced in sweat when a person is scared.
Researchers hope the 'fear detector' will make it possible to identify individuals at check points who are up to no good.

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