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Quipu photo :Figure 1

Terrace farming photo : Figure 1

Freeze drying photo : Figure 1

Inca brain surgery : Figure 1

Messenger system: Figure 1

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Graber, Cynthia. “Farming like the Incas.” Smithsonianmag.Com, Smithsonian magazine, 6 summer 2011, www.smithsonianmag.com/history/farming-like-the-incas-70263217/9/20/25. 

Quechuas Expeditions. “Inca Agriculture: The Backbone of an Empire.” Peru Machupicchu Travel - Peru Tour Packages, 4 Dec. 2023, www.quechuasexpeditions.com/inca-agriculture-the-backbone-of-an-empire/9/20/25.

“Incan Farming Style & Crop Rotation: Secrets of Inca Terraces.” Inka Time Tours, 27 July 2025, inkatimetours.com/the-ingenious-incan-farming-style-and-crop-rotation-wonders/10/7/25

Kosiba, Steve. “The Oxford Handbook of the Incas.” Google Books, Google, 2 Apr. 2018, books.google.com/books?hl=en&lr=&id=-6NTDwAAQBAJ&oi=fnd&pg=PA227&dq=inca%2Bfarming&ots=5_nD_Cwvw0&sig=owwiT5Gc5phRJlhfdFyrvZSjZQY#v=onepage&q=inca%20farming&f=false9/20/25

Brady, Heather. “Lofty Ambitions of the Inca | National Geographic Society.” Education.nationalgeographic.org, 2 June 2022, education.nationalgeographic.org/resource/lofty-ambitions-inca/9/20/25.

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Cusco Image Source

The Editors of Encyclopedia Britannica. “Cuzco | Peru.” Encyclopædia Britannica, 11 Oct. 2016, www.britannica.com/place/Cuzco.

“Pachacamac | Peruvian God | Britannica.” Www.britannica.com, www.britannica.com/topic/Pachacamac-Peruvian-god.

Pachacamac Image Source 

Moray Image Source

          “Discover the Ancient Moray Archaeological Site in Peru.” Peru Explorer - Expert Peru Travel Guide & Tours, 16 Nov. 2024, www.peru-explorer.com/discover-the-ancient-moray-archaeological-site-in-peru.htm. Accessed 30 Nov. 2025.

Pisac Image Source

          “Pisac: History, Location, Height and More | Peru Choquequirao Trek.” Peru Choquequirao Trek, 5 Feb. 2022, peruchoquequiraotrek.com/pisac-cusco/.

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