Sinkholes are sudden holes that open up in the ground when the surface layer drops into empty spaces below. They can be as small as a dip in a garden or so big that they swallow houses, cars, and even ...

In relatively dry southern Colorado, they also provide a secondary round of water storage. The first round is Colorado’s snowpack, which, as it melts, feeds groundwater that fens’ spongy peat captures ...

The Pascua Yaqui Tribe, along with U.S. Rep. Greg Stanton, joined U.S. Army Corps of Engineers leaders Sept. 12 near Tucson ...

Illinois once harbored more than 8 million acres of wetlands. By the 1980s, all but 1.2 million wetland acres had been lost, ...