00:00A single wooden pole once sank an ironclad warship.
00:03How did that even work?
00:05It was called the Spar Torpedo.
00:07A copper canister of black powder lashed to the end of a long pole.
00:11A small boat would creep through the dark and ram that pole straight into an enemy hull below the waterline.
00:18The hit snapped a friction fuse inside the canister and touched off the charge underwater.
00:23The hull tore open in seconds and the sea rushed in.
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