Neanderthal 'artwork' found in Gibraltar cave

http://www.bbc.co.uk/news/science-environment-28967746

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An engraving found at a cave in Gibraltar may be the most compelling evidence yet for Neanderthal art.

The pattern, which bears a passing resemblance to the grid for a game of noughts and crosses, was inscribed on a rock at the back of Gorham's Cave.