Since the late 19th-century, scholars have proposed to identify the Rig Vedic Saraswati river with the Ghaggar-Hakra River system, which flows through northwestern India and eastern Pakistan, between the Yamuna and the Sutlej, and ends in the Thar desert. Recent geophysical research shows that the supposed downstream Ghaggar-Hakra paleochannel is actually a paleochannel of the Sutlej, which flowed into the Nara river, a delta channel of the Indus River. 10,000-8,000 years ago this channel was abandoned when the Sutlej diversed its course, leaving the Ghaggar-Hakra as a system of monsoon-fed rivers which did not reach the sea.