A search is under way for the ship that carried Charles Darwin to South America.
HMS Beagle is best known for her second, voyage in 1831-36, when Darwin gathered evidence that convinced him of the principle of natural selection.
The vessel carried the naturalist Charles Darwin and was sold for scrap in 1870 for £525
Marine archaeologists believe that the remains of the brig-sloop are submerged in a mudbank near Paglesham, Essex.
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