Under human influence, species are spreading faster than ever.
Vietnam's threatened, still-mysterious biodiversity gets a conservation connection.
The delta's levees are no match for a big earthquake.
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.