April 22, 2013 at 06:25PM
Study suggests "Medieval Warm Period" occurred in only a small region.Study: Earth Warmed More at End of 20th Century Than in Past 1,400 Years from U.S. News
April 22, 2013 at 06:25PM
Study suggests "Medieval Warm Period" occurred in only a small region.Study: Earth Warmed More at End of 20th Century Than in Past 1,400 Years from U.S. News
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