Mystery deaths of HL Hunley submarine crew solved – they accidentally killed themselves

The mystery of how the crew of one of the world’s first submarines died has finally been solved – they accidentally killed themselves.

The HL Hunley sank on February 17 1864 after torpedoing the USS Housatonic outside Charleston Harbour, South Carolina, during American Civil War.

She was one of the first submarines ever to be used in conflict, and the first to sink a battleship.

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