Science
Ancient cave painters deprived themselves of oxygen to get high, new study suggests – CNET
Artists of yore deliberately chose to paint in caves’ darkest, narrowest recesses. Now researchers think they know the reason.

A replica painting from Spain’s Cave of Altamira, home to numerous paintings of contemporary local fauna and human hands created between 18,500 and 14,000 years ago during the Upper Palaeolithic period.
Universal History Archive/Universal Images Group via Getty Images
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