Thousands of holes arranged in a snake-like pattern on Monte Sierpe in Peru could have been a monumental accounting device for trade and tax
Več na: https://www.newscientist.com/article/2503499-mysterious-holes-in-andean-mountain-may-be-an-inca-spreadsheet/?utm_campaign=RSS%7CNSNS&utm_source=NSNS&utm_medium=RSS&utm_content=home
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