Rapid growth in several cities along the Pearl River Delta has made a Chinese megacity larger and more populous than any other urban area in the world.
Acquired September 20 and November 23, 2002, these natural-color images show agricultural fields in Jizzax Province at the end of summer and in late fall.
As they prepare for a satellite that will measure the height and areal extent of rivers in unprecedented detail, hydrologists have released a better map of North American river widths.
The Salmon River in Idaho, one of the longest free-flowing rivers in the United States, rushes through a geologic wonderland of wooded ridges, eroded bluffs, and stone towers and crags.
Acquired April 2, 2011, and February 27, 2011, these natural-color images show rising waters on the Kuiseb River, which flowed all the way to the Atlantic Ocean for the first time in decades.