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Britain's earliest prehistoric art found in Gower's Bacon Hole cave
Mystery remains around the meaning behind the art more than 17,000 years later.
Painted rock art discovered in a Welsh cave has been confirmed to be the oldest in Britain.
The series of 10 red horizontal stripes was first found on the wall of a side chamber of Bacon Hole cave in Gower, Swansea, in 1912, before being dismissed years later as a natural phenomenon.
But archaeologists have now used scientific advances to date the rock art to at least 17,100 years ago - also making it the oldest in north-western Europe.