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Learning More About El Nino NPR''s Christopher Joyce reports on current research suggesting that the weather pattern known as El Nino may have actually benefited civilization in South America thousands of years ago. There is also new evidence that it occurred less frequently than it does now.

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Learning More About El Nino

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Learning More About El Nino

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NPR''s Christopher Joyce reports on current research suggesting that the weather pattern known as El Nino may have actually benefited civilization in South America thousands of years ago. There is also new evidence that it occurred less frequently than it does now.