Extreme droughts did always not coincide with Mayan abandonment of sites, such as Chichén Itzá, according to a new study published in Science Advances
Three protracted droughts — each lasting between 25 and 90 years — likely spelled the end for Indus megacities, around 4,200 years ago
India’s troubled history of monsoon droughts of the last millennium revealed by stalagmites and historical documentary sources
