Dry spells spelled trouble in ancient China: Weakening of summer monsoons to blame

(PhysOrg.com) -- Chinese history is replete with the rise and fall of dynasties, but researchers now have identified a natural phenomenon that may have been the last straw for some of them: a weakening of the summer Asian Monsoons.

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<p><a href="http://www.physorg.com/news145199282.html">Dry spells spelled trouble in ancient China: Weakening of summer monsoons to blame</a></p> <p>(PhysOrg.com) -- Chinese history is replete with the rise and fall of dynasties, but researchers now have identified a natural phenomenon that may have been the last straw for some of them: a weakening of the summer Asian Monsoons.</p>