Chinese scientists announced they’ve invented a new kind of coating for aircraft and other weapons that’s virtually undetectable by radar. 

This new, lab-made “metamaterial,” in essence a very fine mesh with microscopic etchings, could shrink the radar signature of a fighter jet, warship, or missile by a thousand times, claimed the scientists at the Chengdu-based Institute of Optics and Electronics, part of the Chinese Academy of Sciences.

If the Chinese team led by professor Luo Xiangang is telling the truth and their metamaterial works like they’ve claimed, China might seem poised to become the world leader in stealth technology, leapfrogging the United States and effectively canceling out a major American military advantage.

But there are good reasons to be very skeptical.

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