استالاگمیت های غار الگوهای جهانی بارش باران های موسمی را در 450000 سال گذشته ثبت می کنند.

Cave stalagmites document global patterns in monsoon rainfall over the past 450,000 years

Nature, Published online: 21 October 2026; doi:10.1038/d41586-026-03285-8 A 450,000-year stalagmite record of rainfall in the Amazon Basin , combined with existing Asian records, shows that the global monsoon system has oscillated regularly, strengthening in one hemisphere while weakening in the other. However, during intervals of warmth and warming climate, monsoons in both hemispheres failed for millennia.