Electricity flowing along a metal wire, the gravity that keeps us grounded, the air we breathe, the bacteria and viruses that make us ill, the X-rays that reveal our broken bones - all are invisible to our eyes. And yet, our waking world is full of familiar invisible phenomena. Power, devilry, secrecy, ethical dilemma, and moral corruption - invisibility has it all. Indeed, for thousands of years, authors have grappled with the idea. There is both great fear and great desire in the thought of invisibility. The technology to make an object simply disappear from view is now a reality.
At work is the magic of science, of course. Clarke famously wrote that, "any sufficiently advanced technology is indistinguishable from magic." These words most certainly ring true with respect to invisibility cloaking devices.
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