Wed, Sep 03, 2014 at 3:29 PM
'This will be worse than anything seen during the last 2,000 years,' researchers say.
Mon, Aug 25, 2014 at 2:43 PM
Ovation series uncovers mysteries surrounding Van Gogh, Vermeer, Fabergé eggs and the 'Mona Lisa.'
Tue, Jul 08, 2014 at 9:00 AM
Here are some fascinating geothermal wonders from around the world that aren't suitable for swimming, but they're undeniably sublime to observe from a distance.
Tue, May 20, 2014 at 10:05 AM
The image of a supercell — the rarest and most severe type of thunderstorm — was taken by storm chasers over eastern Wyoming.
Fri, May 16, 2014 at 6:00 AM
The hole in the ozone layer is reported, and Marsh Arabs return to Iraq.
Mon, Apr 14, 2014 at 8:00 AM
These adorable baby animals are more than simply cute; they're living symbols designated by state governments to honor regional natural history.
Sun, Apr 06, 2014 at 7:00 AM
Lois Marie Gibbs begins her fight against toxic waste, and the Dalia Lama speaks about poaching.
Tue, Mar 25, 2014 at 3:27 PM
Just because this volcano hasn't erupted in 70,000 years doesn't mean it isn't full of new information for the scientists who study it.
Tue, Feb 25, 2014 at 12:07 PM
As another stormy spring approaches the Great Plains of North America, an impressive new time-lapse video reveals these atmospheric behemoths in action.
Tue, Feb 18, 2014 at 12:25 PM
As the United States seeks to rely less on imported oil, a few states are leading the charge in the renewable energy revolution.