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Megadroughts once reigned supreme in Southwest — and may again

Something else to worry about over the weekend:

As the southern tier of the USA suffers through a drought that stretches from Arizona to Virginia – a distance of some 2,000 miles – new research this week finds that "megadroughts" used to be a common feature of the southwestern USA, and may be again, thanks to our favorite villain, climate change.

These "megadroughts" lasted for, um, millennia, which I think is a long, long time.

Doyle Rice

Full Story: http://content.usatoday.com/communities/sciencefair/post/2011/02/megadroughts-southwest-global-warming-climate-change/1

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