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Llama droppings aided in the rise of the Incas

New research is suggesting that the Inca used llama droppings to fertilize their crops, allowing them to grow at high altitudes. In the June issue of Antiquity, paleoecologist Alex Chepstow-Lusty of the Institut Français d’Etudes Andines in Lima, presents findings from a lake sediment core showing that farmers near Cuzco began

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