Summary
Some of Europe's most spectacular prehistoric cave paintings reopened to a handful of visitors for a glimpse Thursday after a 12-year closure.
Renowned for vivid paintings of bison and animal-headed humans, the cave at Altamira in northern Spain shut in 2002 because scientists said the breath from visitors was damaging the prehistoric paint.
Experts say the cave was inhabited 35,000 to 13,000 years ago.
In January, the foundation that manages the cave said it could reopen to groups of five people a week and for just 37 minutes at a time.
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