The Nuclear Regulatory Commission is proposing to eliminate a foundational safety principle that has for 50 years minimized the radiation people in the United States are exposed to, and that has been adopted around the world

Federal wildlife authorities are investigating after a video appeared to show a person kicking a protected sea lion at a beach in California

Tropical Storm Genevieve has strengthened into a hurricane in the Pacific Ocean southwest of Mexico

Police say two men climbed over the glass wall of Seattle’s iconic Space Needle on Friday, flipped over the edge and parachuted down from the 605-foot structure

Dry, windy weather is fueling a big wildfire a few miles north of Sisters, Oregon

A heat dome is set to expand across much of the central United States, pushing temperatures above 100 degrees from Dallas to North Dakota

Trump’s tariffs are headed to court — again

The combination of the worst snowpack on record and fast-spreading wildfires is changing the job description for ranchers in the Rocky Mountains

A growing trend called “teen takeovers” where scores of young people converge on small areas have raised safety concerns in cities across the United States, and prompted officials to develop strategies to control the trend