Archaeology. Mystery towers in Peru are an ancient solar calendar
- PMID: 17332383
- DOI: 10.1126/science.315.5816.1206a
Archaeology. Mystery towers in Peru are an ancient solar calendar
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Chankillo: a 2300-year-old solar observatory in coastal Peru.Science. 2007 Mar 2;315(5816):1239-43. doi: 10.1126/science.1136415. Science. 2007. PMID: 17332405
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