By David Crane defrev (at) gmail (dot) com June 16, 2009 It looks like the whole metamaterial/negative-index material Search terms for the article: future submarines, future us submarines, caterpillar drive submarine, submarine caterpillar drive, caterpillar submarine, future military submarines, submarines of the future, military submarines, caterpillar submarine drive, Military Invisibility Cloak, future military technology, future

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