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NPR reports:

Pirate ships exist mostly in legend, but a real one - the Whydah - was discovered off Cape Cod by Barry Clifford in 1984. It's the only authenticated pirate ship ever found, and just like in legends, it was laden with treasure. Clifford and his team have just recovered a new collection of artifacts from the ship ... "The pirates testified in court in Boston, and their testimonies were recorded," Clifford said. "They said that the treasure was laid in one heap, that the money was kept in bags, in chests, between decks. And there was about four to five tons just from the Whydah."