Andrea Thompson, Sci Am
In the late 13th century, Native Americans living in cliff dwellings in the what is now the Four Corners region of the U.S. Southwest abandoned their homes en masse. They moved into river valleys, closer to the water that had become a scarce resource in the midst of one of the worst megadroughts to hit the western part of the continent in the last millennium.
Original Title: Western Drought Ranks Among Worst of Last 1K Years
Full Text of the Original Article: https://www.realclearscience.com/2018/12/26/western_drought_ranks_among_worst_of_last_1k_years_284121.html