Human remains found in Civil War Navy submarine

The H.L. Hunley, a Confederate Navy submarine, which was the first ever to sink an enemy ship, may have been raised from the ocean floor in 2000. But just recently scientists were able to open the crank shank, which propelled the sub by hand.

After 100 years of sediment build-up, a tooth was found as well as textiles and a metal wrap around the hand shank to keep the crew from chafing their hands.

RELATED: Lessons still to be learned from Spanish Civil War

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Ruins of a building are seen in the old village of Belchite, in northern Spain, November 13, 2016. REUTERS/Andrea Comas SEARCH "SPANISH RUINS" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. TPX IMAGES OF THE DAY.
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Tomas Ortin, 94, survivor of the Belchite battle, poses for a picture at the ruins of his former home in the old village of Belchite, in northern Spain, November 14, 2016. REUTERS/Andrea Comas SEARCH "SPANISH RUINS" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES.
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A graffiti is seen on the entrance door of San Martin de Tours church in the old village of Belchite, in northern Spain, October 3, 2016. The graffiti reads: "Old town of Belchite, young men don't wander around you anymore. The jots (typical songs and dance of the area) that our fathers used to sing, won't be heard anymore". REUTERS/Andrea Comas SEARCH "SPANISH RUINS" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES.
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While the discovery teaches about how the crew worked, the unsolved mystery of the ship's third and final sinking is still unknown.

During the Civil War, the ship sank twice during test runs, killing 13 confederates.

The sub, then known as the Fish boat, was raised from the ocean and put back to work.

The 40 ft. Hunley attacked and sank the 205ft. USS Housatonic on its third voyage, but then sank itself and was lost at sea.

All eight crew members perished in the disappearance.

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