Full Title: The headband that makes you smarter: US military reveals a bizarre device that increases learning by 40% - and it could be commonly used by 2022 The idea of a headband you can wear to make you smarter may sound like a device from the latest science fiction blockbuster. But experts have revealed such a device in reality – and claim it could increase learning by 40 per cent. And it may not be long before you can get your hands on one, with the designers predicting its use will be common in just five to ten years....