Its growth driven to epic levels by climate change and fertilizer runoff, sargassum puts dozens of species — and people — at risk.

Apes used in animal testing often display symptoms of psychological trauma. Wildlife sanctuaries are helping them recover.

As oyster reefs have declined, other marine species have suffered and coastal storm damage has increased. Innovative programs are starting to help.

Regions that have been lucky so far may be less well prepared for an unprecedented heatwaves in the future.

New research finds that at least 254 bat species face pressure from hunters, and that could push some of them into extinction.

Researchers have found PFAS in the bodies of wild animals everywhere they’ve looked. Now they’re beginning to understand the health effects.

Disability is too often left out of the conversation about equity and inclusion in the outdoors. We can change that.

A new book investigates the toxic legacy of Hanford, the Washington state facility that produced plutonium for nuclear weapons.

The health risks from tiny airborne particulate matter may soon face stricter federal regulation. But improving air quality remains a complex challenge.

New solutions are being tested to combat health risks from heat waves, particularly in urban “heat islands.”