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khipu

An Inca quipu, from the Larco Museum in Lima, Peru.

Researchers Say New Find of Khipu Strings May Help Unravel the Inca Record-keeping System

Archaeologists have discovered a collection of khipu (quipu) —a system of colored strings and knots people used to record various matters and send messages in the pre- and post-colonial eras in Peru—...