Forget HoloLens, forget smart glasses and forget augmented reality -- scientists have proposed a "cortical modem" that plugs into your DNA and your visual cortex to cure sight loss and show a heads-up display in front of your very eyes. The cortical modem concept is the brainchild of DARPA, the US Defense Research Projects Agency. Originally founded in 1958 in response to the launch of Sputnik, DARPA is the US military's research and development agency. It's perhaps best known outside of military circles for the development of ARPANET, an early packet switching network that formed a precursor to the Internet....