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Ritual Drinks in the pre-Hispanic US Southwest and Mexican Northwest

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By Laurie Milne September 11, 2015 - 4:24pm

See Vol. 112 No. 36 of the Proceedings of the National Academy of Sciences published on September 8, 2015 for an interesting article by Patricia L. Crown et al on the use of caffeinated beverages found through residue analysis at archaeological sites in the US Southwest and Mexican Northwest.  Residues from both cacao and holly are identified and discussed.

http://www.pnas.org/content/early/2015/09/02/1511799112