Threads That Speak: How The Inca Used Strings to Communicate | National Geographic
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The Weirdest Language Of All Time Is FINALLY Being Deciphered
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Inca Khipu: The record and writing system made entirely of knots | Curator's Corner S6 Ep9
43:25
Unearthed: Mayan City of Blood (S1, E1) | Full Episode
14:11
Inside Africa's Food Forest Mega-Project
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Inca Knot Numbers - Numberphile
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The Ancient City That Mastered Water
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The Khipu (knot what you think...)
4:39