Ape School Rescuers train orangutans to return to the wild.
Penguins on Thin Ice Climate change, competition for resources, and other complex factors are decimating many of the world's penguin populations. Scientists and conservationists alike are battling against time to stem the damage.
The Volcano That Lied How Santorini is changing history 3,600 years after it blew.
Earth from Above A gallery of awe-inspiring photos.