EarthFebruary 1, 2019
Are Antarctica’s Glaciers Collapsing?
Rapid glacier retreat could put coastlines underwater sooner than anticipated
Stories by Richard B. Alley
Richard B. Alley is a professor of geosciences at Pennsylvania State University. He has spent more than 40 years studying ice sheets and has advised the U.S. government on a variety of climate issues.
EnvironmentNovember 1, 2004
Abrupt Climate Change
Winter temperatures plummeting six degrees Celsius and sudden droughts scorching farmland around the globe are not just the stuff of scary movies. Such striking climate jumps have happened before--sometimes within a matter of years
The SciencesFebruary 1, 1998
Greenland Ice Cores: Frozen in Time
Ice, frozen in place for tens of thousands of years, provides scientists with clues to past—and future—climate