A mysterious shipwreck has finally been identified as a whaler lost more than 160 years ago after scientists analysed tree rings in the rotting timber.
The rings revealed the wreckage off the coast of Argentina to be the remains of the Dolphin, an American whaling ship that sank in 1859 some 10,000 miles from home.
Archaeologists have spent years researching the ship's origin without making a definitive identification.
