By <a href="http://www.technologyreview.com/contributor/kevin-bullis/">Kevin Bullis</a> -<br><br>Early next year you should be able to buy a small device that uses electricity to change your mood at the press of a button on your smartphone. The device, from a startup called <a href="http://www.thync.com/about">Thync</a>, currently consists of a set of electrodes connected to a phone. It has a short-lived energizing effect that feels a little like drinking a can of Red Bull.<br><br><a href="http://www.technologyreview.com/news/532321/device-changes-your-mood-with-a-zap-to-the-head/">READ MORE ON MIT TECHNOLOGY REVIEW</a>
