The provenance of the carvings, however, is impossible to prove. While it's thought the cave would once have been brightly painted, very little pigment remains, and that which does is too contaminated to be carbon dated. There is no other organic material in the cave that can be dated – the human remains, discovered in an age before modern conservation practices, have long been lost. The most reliable way to date the carvings is by a stylistic examination, which was carried out in 2012 by the Royal Armouries Museum in Leeds.
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