Ancient drought and rapid cooling drastically altered climate

Two abrupt and drastic climate events, 700 years apart and more than 45 centuries ago, are teasing scientists who are now trying to use ancient records to predict future world climate.

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<p><a href="http://www.physorg.com/news164546585.html">Ancient drought and rapid cooling drastically altered climate</a></p> <p>Two abrupt and drastic climate events, 700 years apart and more than 45 centuries ago, are teasing scientists who are now trying to use ancient records to predict future world climate.</p>