U.S. wildlife officials have taken the first step to lift federal protections for grizzly bears in the northern Rocky Mountains, which would open the door to future hunting in several states.

By Matthew Brown, Associated Press

The Trump administration has announced major changes to the Endangered Species Act, the landmark law signed by President Richard Nixon that's credited with saving iconic species like the bald eagle and the grizzly bear. William Brangham talks to Lisa Friedman…

For the whitebark pine tree, red is the sign of death. As disease and beetles sap life from the knotty, sometimes misshapen tree that thrives in some of the most inhospitable landscapes of the northwest U.S. and Canada, it turns…

By PBS News Hour