Travel the entire length of the Sky, the world’s highest major river, as it flows from the Himalayan mountains down to the Indian Ocean, passing Asia’s biodiversity hotspots and affecting more than a billion people along the way.
2015
1954
1995
1984
1990
2016
2021
2020
2009
1974
—
2022
1997
2014
2017
2018
2011