A predator returns - and reverses decades of aspen decline.
How have humans altered Earth's land surface? See it via satellite.
Athens copes with the aftermath of a devastating fire.
Impacts from the IPCC's 2007 report.
The southeastern U.S. burned repeatedly in this season's extreme drought.
Can a nation return its captive elephants to the forest?
The muddy trails of bottom trawlers are visible from space.
Tinder-dry southeast Georgia is beset by the worst blazes ever seen in the state.
A Korean estuary is turning to farmland, endangering hundreds of thousands of shorebirds.
Biologists discover that 1 Asian frog species is really 18.