Should Scientists Synthesize a Hormone That Causes Fear?

A group of US neuroscientists have been studying why the scent of sweat from terrified people causes other people go into the hyper-alert fight-or-flight mode. People smelling this "stress sweat" in fMRI brain scanners show activity in the emotion-processing amygdala, and are 43 percent more accurate at identifying… » 7/29/09 11:59am 7/29/09 11:59am