This chapter explores the historical use of rubber in the Amazon and Mexico, discussing its uncertain specific uses and the presence of stone spheres in Costa Rica resembling the Olmec heads. The origin and purpose of these flawless spheres remain unknown.
Graham Hancock is a researcher, journalist, and author of over a dozen books including "Magicians of the Gods" and "Visionary." He can be seen on the Netflix series, "Ancient Apocalypse."www.grahamhancock.com
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