Mexican cave stalagmites reveal the deadly droughts behind the Maya collapse

Chemical evidence from a stalagmite in Mexico has revealed that the Classic Maya civilizations decline coincided with repeated severe wet-season droughts, including one that lasted 13 years. These prolonged droughts corresponded with halted monument construction and political disruption at key Maya sites, suggesting that climate stress played a major role in the collapse. The findings demonstrate how stalagmites offer unmatched precision for linking environmental change to historical events.