"That humans are directly killing killer whales across all age classes is significant; it says we can do a better job."

The drop in pollution since the passage of the 1970 US Clean Air Act hasn't just helped humans breathe cleaner air. It's also benefited birds.

Black bears have far simpler gut microbiomes than researchers expected to find, a new study reveals. Diet and environment may be key to their gut bacteria.

Scientists have created the first world map of bees, which are crucial to ecosystems and crops around the world.

Preserving wildlife corridors between protected areas could help maintain genetic connections between African elephant populations, researchers report.

New research identifies four species of ocean fish that tend to get caught more than once. Here's what that means for sustainable fisheries.

DNA in animal feces could help researchers get a picture of an entire ecosystem and the secondary effects of extinction or invasive species.

In just 100 years, humans have had a significant impact on the genetic diversity of lions. "I was surprised... and disappointed," says James Derr.

Free food—and to a lesser extent free shelter—may be why wild animals often hang out in suburban backyards, a new study shows.

Affordable health care could be a key tool in the fight against climate change, research from Indonesia finds.