Some of the earliest ancient human civilisations in South Asia originated from areas encompassing present-day Pakistan. The earliest known inhabitants in the region were Soanian during the Lower Paleolithic, of whom stone tools have been found in the Soan Valley of Punjab. The Indus region, which covers most of present day Pakistan, was the site of several successive ancient cultures including the Neolithic Mehrgarh and the Bronze Age Indus Valley Civilisation (2,800–1,800 BCE) at Harappa and Mohenjo-Daro.