Marine archaeologists think they've discovered a lost Portuguese ship from explorer Vasco da Gama's fleet off the coast of present-day Oman, more than 500 years after it sank in a deadly storm. A team led by David Mearns, of the U.K.-based Blue Water Recoveries, first located the shipwreck in 1998 using archives and historical documents as a guide. After recent underwater excavations and careful analysis of more than 2,800 artifacts, including cannonballs and rare coins, the researchers are now fairly certain they have found the nau Esmeralda, the doomed ship commanded by da Gama's uncle.
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