- Scientists may finally have an explanation for the centuries-old 5,200 mystery holes in the Peruvian Andes Live Science
- Mysterious holes in Andean mountain may be an Inca spreadsheet New Scientist
- There Are Thousands of Aligned Holes in Peru. Researchers Think They Finally Know Why Gizmodo
- A centuries-old grid of holes in the Andes may have been a ‘spreadsheet’ for accounting and exchange The Conversation
- Why did the Inca dig thousands of holes in this mountain? We may now know. National Geographic
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