Inhabitants of southern Mexico began to cultivate maize, the major grain crop of prehistoric societies in the Americas, by at least 6,300 years ago, a new study finds. This is around 800 years earlier than previous estimates.
A279_1465.JPG Researchers have found ancient maize in Mexico at Guilá Naquitz and in Tehuacán Valley. A proposed ancestor of maize grows in the Central Balsas Valley.
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