Improved Sonar and Stealth With The Same Nanotube?

If a submarine covered in carbon nanotubes drives in the ocean, can you still hear it?

If there is one thing navies the world over want, it's more efficient sonar and the ability to hide their own submarines from it. Of course, the downside of such a technology is the heightened probability of more mid-ocean collisions.

Last summer, University of Illinois at Urbana researchers spoke of a new metamaterial that could be used to, in essence, guide incoming sonar waves around the hull of a submarine. The material also holds promise for super-high-definition ultrasound machinery for hospitals.

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