Burned out but too anxious to admit it to your boss? Or are you just bad at knowing when to take a break? In either case, a new device could be just what you need — if you're willing to rock some temporary face tats. As detailed in a new study published in the journal Device, researchers have created a wireless and non-permanent "e-tattoo" that detects when your brain is overloaded by using a series of electrodes and a machine learning algorithm.  This technology, the researchers believe, could be used on professionals who work in high-stress, high-stakes fields, like pilots […]