grain was an important economic resource as early as 18,000 years ago. An agricultural type of existence spread to the European continent some 6,000 years ago, replacing a nomadic hunting existence. There is evidence that corn was first cultivated in what is now Mexico about 5,000 years ago, followed about 1,500 years later by potatoes in South America and rice in the Far East. Some of our present-day fruit crops-grapes, figs, olives, dates, pomegranates, and mulberries-were being cultivated in the…
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