To hide a submarine from sonar, all you need is a little industrial strength bubble wrap.

While current subs use 1-inch-thick rubber foam to go by undetected, materials scientists at Université Paris-Diderot, the University of Manitoba, and PSL Research University are working on a technique to create a much thinner sheet of rubber populated by thousands of bubbles that work to deflect sonar while saving on weight over the bulky foam.

Lab tests have shown that the material cuts down on radar wave detection by 10,000 times. What the scientists don't have is a cost-effective way to coat an entire submarine—at least, not yet. They'll also have to work out the size of the bubbles to make the technology as effective as possible.

Source: Yahoo News

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