PHILIPPE PSAILA / SCIENCE PHOTO LIBRARY PHILIPPE PSAILA / SCIENCE PHOTO LIBRARY
Wild colt (Equus caballus) standing amongst trees. Mares give birth to a single foal after a gestation period of approximately one year. The horse originated in Asia, where it was tamed by humans to carry riders and loads. All wild horses today are descended from feral horses kept by humans. Photographed in the mountains above Sabucedo, Galacia, Spain.
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