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The Historyscoper's Science and Technology Watch Blog Apr. 2, 2015

Wednesday, December 4, 2013

New Russian Submarines Are So Silent That The U.S. Navy Calls Them “Black Holes”

http://www.pakalertpress.com/2013/12/04/new-russian-submarines-are-so-silent-that-the-u-s-navy-calls-them-black-holes/

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