Timeline from 800 AD to present showing dry/wet periods in the Western USA. (Photo: Data from E.R. Cook et al published in Earth Science Reviews, chart by Karl Kahler, Bay Area News Group with annotation added by Anthony Watts)
Screen Shot 2021-12-13 at 12.55.38 PM
By Katy Grimes, December 13, 2021 12:56 pm
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