Climate change likely caused migration, demise of ancient Indus Valley civilization

More than 4000 years ago, the Harppa culture thrived in the Indus river valley of what is now modern Pakistan and northwestern India, where they build sophisticated cities, invented sewage systems that predated ancient Rome's and engaged in long distance trade with settlements in Mesopotamia. Yet by 1800 BCE, this advanced culture had abandoned their cities, moving instead to smaller villages in the Himalayan foothills. A new study from the Woods Hole Oceanographic Institution found evidence that climate changes likely drove the Harappans to resettle far away from the floodplains of ht Indus.