Farmers in the Andes use biodiversity as insurance.
Scientists study underground microbes, seeking cures for disease.
Decreasing biodiversity may be related to the increase in cases of Lyme disease in humans.
That tenacious invader, the zebra mussel, is loosening its grip on the Hudson River.
Visit Alaska's boreal forest to learn its role in Earth's climate.
What's driving the rapid evolution of fish in the Lower Congo River?
For marine life, climate change means more than warming.
Conservationists have reintroduced the only undomesticated horse species to its homeland.
Under human influence, species are spreading faster than ever.