Climate change could bring grave water shortages to the American Southwest.
See how human activity is changing fire patterns around the world.
Satellites show severe deforestation in a rare monarch butterfly overwintering site.
What happens when rivers are allowed to flow on their own?
Most coral reefs are badly degraded, but Kingman Reef is the picture of health.
A new study finds that mangrove forests and shrimp farms can coexist--to some extent.
A new study shows that pollutants can take a century or more to show up in rivers and streams.
Biologists have announced many Antarctic discoveries during International Polar Year.
Oil spills foul shores in San Francisco Bay and the Black Sea.
Houses in fire-adapted habitats burned during some of the worst blazes in California history.