Confirming their worst fears for record-low lake levels, National Park Service fisheries biologists have discovered that a non-native predator fish has made its way through Glen Canyon dam to the lower Colorado River, where it can prey on ancient native fish they have been working to reestablish.

The Energy Department is teaming with actor Robert Downey Jr. to recruit up to 1,000 new workers focused on climate change and clean energy.

Favorable weather has helped the fight against a wildfire in California’s Gold Country that has forced evacuations in two counties.

Somalia’s president has called for assistance from Turkey to combat the effects of severe drought that is threatening the Horn of Africa.

Conditions in the Italian Alps were too unstable Wednesday for search teams and dogs to work on the mountain after a fatal weekend avalanche.

The war in Ukraine is fueling fears of a natural gas emergency in Europe.