These two images, taken 30 years apart, show the decline of the Heilprin and Tracy glaciers from 1987 to 2017. (NASA) At a Glance A pair of photos show how much two Greenland glaciers have retreated in the last three decades.The images show the changes at the Tracy and Heilprin glaciers in northwestern Greenland.Both glaciers have retreated at a far more rapid pace in recent years. A pair of Greenland glaciers have been crumbling at an accelerated pace in the...

Nevada’s fourth-largest lake continues to shrink, because of a mainly non-existent flow of water from the Walker River. ...

A man crosses a street in the rain at the commercial district at Houjie town on January 26, 2016 in Dongguan, China. Researchers are attempting to address the country's water issues by building a massive rain-making network three times the size of Spain. (Lam Yik Fei/Getty Images) At a Glance Researchers in China want to build a massive weather-altering network in the Tibetan mountains to produce more rain.It would be made up of machines that create silver iodide particles that...