For nearly 20 years, physicists and engineers have chased the idea of invisibility. Early efforts focused on hiding objects from light using so-called metamaterials with extreme and often unrealistic ...

Researchers at Purdue University may have created the first practical way to communicate with absolute secrecy by concealing messages in time using tricks of laser light and fiber optics. The ...

Much has been made in recent years of breakthroughs in creating “invisibility cloaks” along the lines of those dreamed up by Harry Potter author J.K. Rowling. Now comes word out of China that ...

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