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Altamira Bison

Credit: MNCN-CSIS, Spain
A painted bison on the ceiling of Altamira cave in Spain. The cave is closed to the public because human incursions have caused damage to the 14,000-year-old paintings.
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Stephanie Pappas

Stephanie Pappas is a contributing writer for Live Science. She covers the world of human and animal behavior, as well as paleontology and other science topics. Stephanie has a Bachelor of Arts in psychology from the University of South Carolina and a graduate certificate in science communication from the University of California, Santa Cruz. She has ducked under a glacier in Switzerland and poked hot lava with a stick in Hawaii. Stephanie hails from East Tennessee, the global center for salamander diversity. Follow Stephanie on Google+.
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