NASA says that a ban on CFCs enacted in the 1980s has contributed to a 4 percent rebound since 2000 in atmospheric ozone in mid-northern latitudes.
The 45 U.N. troops were taken hostage last month on the Syrian-controlled side of the Golan Heights.
While Apple unveils a futuristic new smart watch, Amazon slashes prices on its smartphone for shoppers. Both companies are searching for the innovation sweet spot in mobile.
For adults, "sagging" has long been a marker of slovenliness or something more sinister. But the style might just be the latest iteration of fashion freighted with some old anxieties.
At first, Sun Han made a staggering 100 percent profit margin on his furniture. Soon everyone in his village was opening a furniture factory and didn't need to raise pigs anymore.
Farmers are too frightened to tend their fields. Customers have stopped going to restaurants, bars and other shops. So now people in Liberia's "breadbasket" region are depending on food donations.
President Obama, the first lady and vice president gathered for a moment of silence at the White House. Other ceremonies are scheduled at the Pentagon, in New York and in Shanksville, Pa.
The School of Public Health will be renamed in honor of H.T. Chan, whose son, a longtime university benefactor, received two degrees from Harvard in the 1970s.
A high school senior looks back on five schools pre- and post-Katrina.