In what is seen as the US’ growing appetite for futuristic military hardware, the country is now eyeing a submarine that never runs out of power. The Defense Advanced Research Projects Agency (DARPA) is already working on ‘Manta Ray’ robotic submarine that could address challenges of energy management.    WATCH: Myanmar Military Crackdown Intensifies As … Continue reading U.S. Developing Futuristic Robotic Submarines That Will ‘Never Run Out Of Power’