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The vet of the oldest living land animal in the world, Jonathan the tortoise, reveals the key to his longevity.

Joe Hollins, who lives on the remote British Overseas Territory of St Helena in the South Atlantic, said that the giant Seychelles tortoise's secret was "being very chilled".

Jonathan was landed on the island in 1882, fully grown and aged at least 50. He is now believed to be 183.

Joe said: "He leads a very tranquil life, quite frankly, and I don't think he has a care in the world."

This clip is originally from Phil Williams on Tuesday 19 January 2016.