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A researcher at the University of Texas at Austin has devised an invisibility cloak that could work over a broad range of frequencies, including visible light and microwaves. This is a significant upgrade from current invisibility cloaks that only cloak a very specific frequency — say, a few hertz in the microwave band — and, more importantly, actually make cloaked ...

Hot on the heels of (reportedly) harnessing nuclear fusion and a slew of ballistic missile launches, South Korea’s intelligence agency is now reporting that Kim Jong-Un’s North Korea is developing an electromagnetic pulse (EMP) weapon. At a bare minimum, this EMP could theoretically damage electronic equipment south of the Korean DMZ. At higher power levels, a real EMP device can ...