In this slide it is easy to imagine observing the sunsets as the sun moves along the horizon between the December and the June Solstices.
Isbell, Billie Jean. Culture Confronts Nature in the Dialectical World of the Tropics. In Ethno-Astronomy and Archaeo-Astronomy in the American Tropics, edited by A. F. Aveni and G. Urton. Annals of the New York Academy of Sciences, vol. 385 (1982): 353-363. http://hdl.handle.net/1813/2193
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