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By Neal Ungerleider TASER, best known for their electric shock guns, has a new product: Tiny, sunglass-mounted cameras that upload live footage from a cop's P.O.V. [More]

Once adult lab mice learn to associate a particular stimulus--a sound, a flash of light--with the pain of an electric shock, they don't easily forget it, even when researchers stop the shocks. But a new study in the December 23 issue of Science shows that the antidepressant Prozac (fluoxetine) gives mice the youthful brain plasticity they need to learn that a once-threatening stimulus is now benign.