Colombian archaeologists have retrieved the first items from what’s thought to be the most valuable shipwreck in the world. A Spanish naval ship, the San José, was sunk by a British fleet off the coast of Colombia more than 300 years ago. It had a cargo of gold, silver and emeralds worth billions of dollars in today’s money. Treasure hunters had tried to locate the shipwreck for many years, before Colombia announced that it had discovered it back in 2015.

But how can we be sure this is the actual San Jose - and if it is, who has the rightful claim to the precious cargo onboard?

Helen Farr, a marine archaeologist from the University of Southampton in the UK, takes us through the legal dispute over who owns the ship, and recounts how it ended up on the ocean floor. And we hear from Mariana Carulla, a conservationist in the Colombian ministry of culture, who has been working with the team that’s retrieving objects from the shipwreck. She tells us what they have found so far - and explains how authorities are searching for clues about the shipwreck’s true identity.

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