New Scientist -- A lightweight battery-free headset can continuously monitor human brainwaves, and is powered by body heat and sunlight. The portable electroencephalogram (EEG) device resembles a set of headphones. It could provide wireless monitoring of patients at risk of seizures, have cars or other machinery respond to stressed users, or provide new ways to interact with computer games. Researchers at the Interuniversity Microelectronics Centre (IMEC), in Belgium, created the headset.
