A study by the University of California San Diego has claimed that by 2050, the Sun is expected to become cool. You might think "what's the big deal," but remember that this means the solar activities that create the heat of the Sun to sustain life on Earth may diminish. And the last time it happened was in the 17th Century, when the Thames River froze. Scientists call this the "Maunder Minimum".
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http://www.ibtimes.co.in/scientists-warn-mini-ice-age-that-could-hit-earth-freeze-major-rivers-by-2030-754819
http://www.ibtimes.co.in/huge-amounts-ice-age-mercury-trapped-inside-arctic-permafrost-waiting-global-warming-release-759717
Read more and watch the video at http://www.ibtimes.co.in/scientists-warn-unusually-cold-sun-will-we-face-another-ice-age-759865.