Books often use the phrase, "you could smell their fear", but have you ever smelled fear? Believe it or not this has been studied recently and the conclusions proved the fear signifier scent caused by an adrenaline release could be differentiated from regular sweat. In case you're wondering how they arrived at that conclusion they had participants wear sweat pads under their arms to collect regular sweat then they changed to fresh pads and the participants were shown scary videos, now comes it icky part...the sweat samples were presented to a different group who could tell which samples were fear induced and which were regular sweat by scent alone. Another study not to take part in, at least not as a sweat sniffer.
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