The western side of the Antarctic Peninsula has seen sharp declines in Adélie penguin populations in recent decades. Things look better on the eastern side. Take a tour.
Rapid habitat changes are already affecting polar bear behavior; with the sea ice retreating quickly, some of the bears now have to swim long distances in order to find places to den.
The United States is home to 95 million cattle, and changing what they eat could have a significant effect on emissions of greenhouse gases like methane that are warming the world.
One of the world’s most spectacular primates has become a symbol of conservation in Brazil, where an overpass is being built over a major highway to keep the species going.
