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What did the Incas invent?
is terrace farming?
How did the Incas freeze dry food?
What system of measurements did the Incas invent?
What else did the Incas invent?
Did the Inca invent a written language?
Did the Inca invent the wheel?
was Inca science like?
What type animals did the Inca breed?
What were the Incas engineering accomplishments?
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