RadioLab - 9 Volt Nirvana

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Ttranscranial direct current stimulation (tDCS) is a form of neurostimulation which uses small DC currents to stimulate brain activity.
A very large body of evidence has suggested that these tiny currents can safely: Accelerate learning, reduce or eliminate depression, reduce addiction, anxiety and be used for many other useful purposes.
Recent Defense Department (DARPA) testing has shown tDCS patients were able to learn and retain information/new skills in half the time of those in a control group.
Click any link to the side for a few of the many popular scientific articles on tDCS.