A 44,000-year climate history recorded in a stalagmite in a wet cave in the Santa Rita Mountains lends credence to what scientists have long suspected: When the climate warms globally, the Southwest dries out.

(foto by StarbuckGuy "Cave of the Bells" - flickr)

In a paper to be published in February's Nature Geoscience, a team of University of Arizona researchers reports abrupt shifts between wet and dry periods that correspond to...

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