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Evidence that Americans have been obsessed with caffeine for 1,000 years

Nearly 1,000 years ago, the peoples of the ancient city Cahokia lived on the banks of what is today called the Mississippi River. Today, new research suggests these people were ritualistically imbibing the "Black Drink", a hot, super-caffeinated beverage that did a lot more than make you alert. » 8/09/12 7:15am 8/09/12 7:15am