The hurricane took a disproportionate toll on power supplies in remote areas of Puerto Rico. Read More...

New elevation measurements span the continent’s icy surfaces, from the flat Ross Ice Shelf to the rugged Transantarctic Mountains. Read More...

Satellites detect changes in the height and velocity of ice in an area that was thought to be relatively stable and quiet. Read More...

Farms and feedlots are a key source of the pollutant. Read More...

The peaks of these mountains are a dramatic expression of massive tectonic forces pushing continents together. Read More...

Hydroxyl radicals are critical for offsetting concentrations of methane in the air. Read More...