NASA Discovers the Worst North American Drought in History

October 16, 2014 10:44 AM

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Scientists may have just pinned down the worst drought in North American history. They've examined the last 1,000 years and found that the drought of 1934 was the driest and most widespread of the last millennium.

In order to pin down the severity of the drought, the scientists used a tree-ring-based drought record from the years 1000 to 2005 in addition to modern records. This revealed that the 1934 drought was 30 percent more severe than the runner-up drought, which occurred in 1580. In fact, this drought e...

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