Many of the gray whales found dead this year have suffered from malnutrition. Researchers are rushing to find the cause.

The deeply unpopular plan would benefit a few rich oil companies while threatening people, wildlife and the climate.

When something dies in nature, it becomes part of a system that gives life. Can humans re-embrace the same concept?

In Idaho, a breathtaking new reserve promises to preserve the darkness — and shows how other communities can follow.

The documentary Cascades Crossroads showcases the hard work — and compromises — necessary to protect migrating animals from deadly highways.

A Republican bill threatens to open up federal wilderness areas to mountain biking — and in the process threatens the 1964 Wilderness Act.

Drilling in the refuge was tucked into in last month’s Republican tax bill, defying decades of attempts to protect this pristine wildnerness.