Throughout the grasslands of northern Mongolia and southern Siberia lay scattered hundreds of megaliths bearing mysterious carvings that seems to depict flying reindeer. Known as deer stones, these upright stone slabs measure 3 to 15 feet tall and occur in small groups, or concentrated in larger groupings, often in association with stone burial mounds, called khirigsuur. There are over 900 deer stones in Central Asia and South Siberia, of which 700 are in Mongolia alone. These monumental features is believed to be erected by Bronze Age nomads, approximately 3000 years ago.

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