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, military submarines, caterpillar submarine, submarines of the future, caterpillar submarine drive, future submarine, future military submarines, chinese sub caterpillar drive, future
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