I'll be honest. There were times, particularly in the early years before tens of thousands marched in protest, when I wasn't confident that President Obama would reject Keystone XL.
What one skier did when the surface cracked.
Egrets gather on a floodplain in Danube-Dráva National Park, Hungary.
Sorry, beavers. Hydrologists trying to improve conditions for fish just don't need you anymore.
To fish or to mine? Alaskans must decide the future of a wild beach with a long history.
Lumber Liquidators was turning virgin trees from the world's last Siberian tiger habitat into floorboards.
Can you help Clueless U clean up its act? Play to find out.
A Columbia student helps Nepali villagers deal with climate change.
A wig made of sea sponge protects this crustacean from predators.