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The history of the submarine dates back as far as Alexander the Great and continues to be one of the most fascinating pieces of military technology there is. When you add in the fact that many of the worlds subs are now nuclear, things get even more interesting. We'll walk you through the history of submarines, advantages and disadvantages of diesel and nuclear, some amazing facts about the worlds most powerful subs, and a story of how a single Swedish sub took our an entire aircraft carrier and supporting fleet.