13,000-year-old carvings in Turkey may be the world's oldest lunisolar calendar
13,000-year-old carvings in Turkey may be the world's oldest lunisolar calendar
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World's oldest calendar found at 13,000-year-old temple in Turkey
13,000-year-old carvings in Turkey may be the world's oldest lunisolar calendar
World's oldest calendar found at 13,000-year-old temple in Turkey