Atlantic salmon from Norway carry a dangerous disease that puts native Canadian fish at risk — and maybe those in the United States, too.

New research shows that 2,000-year-old baobab trees are suddenly dying. New trees won’t have a chance, either.

New research finds that one-third of the world's protected areas cannot serve the conservation mission for which they were established.

They’re tasked with protecting the world’s most endangered species, but at least 100 rangers die each year, mostly after conflicts with poachers.

This small, flightless bird, native to an atoll in the Pacific, went extinct as a direct result of World War II.

It took a decade of hard work, but one of the world’s most important wildlife corridors is now emerging from the fragmented forests of coastal Brazil.

Chemicals collect in microplastics, which then get eaten by fish, birds and seals — and by humans.

As extreme weather conditions arrive, vulnerable people in migrating populations could find themselves at risk from sexual exploitation or forced labor.

Exhaustive searchers have failed to turn up the lost Algerian species Adenocarpus faurei. Could other plants in the region also be extinct?

Specialized environmental courts are now operating on every continent except Antarctica. What’s behind the boom?