The Great Serpent Mound in Ohio has long been a source of mystery. Some believe it’s an ancient astronomical marker, aligned with the movements of the sun and moon. Could this massive earthwork hold ...
Reprint of the ed. published by Clark, Chicago. https://siris-libraries.si.edu/ipac20/ipac.jsp?&profile=liball&source=~!silibraries&uri=full=3100001~!53259~!0#focus ...
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