U.S. Geological Survey

Scientists with the U.S. Geological Survey have found evidence of human contamination and forever chemicals in Monument Springs and other remote springs within Grand Canyon National Park.

In a new paper, researchers argue the Grand Canyon was formed when an ancient lake on what is now the Navajo Nation spilled over and cut the iconic gorge over millions of years.

An upcoming episode of the PBS documentary series “Human Footprint," focusing on the Colorado River, premieres in Flagstaff Friday night.

The Trump administration wants to strip funding for two U.S. Geological Survey labs in Flagstaff that research the Colorado River and the Southwest.

In late July, the first truckloads of uranium ore were shipped from the Pinyon Plain Mine near the Grand Canyon. The mine’s owner says it's crucial as the world moves away from fossil fuels, but conservationists and Indigenous communities are pushing back.

Crews are thinning out overgrown brush and trees from a cinder field near Flagstaff where Apollo astronauts trained. The idea is to preserve the historic site and turn back the clock to the days of the space race.

The U.S. Geological Survey published its annual accounting of the Navajo aquifer which underlies Black Mesa on the Navajo Nation. The aquifer supplies drinking water to Kayenta, Tuba City and the Hopi villages.

The United States Geological Survey says a 3.8 magnitude earthquake shook Chino Valley Sunday afternoon but there were no immediate reports of any injuries or damage.

Arizona’s U.S. senators are urging federal officials to classify copper as a critical mineral amid growing demand. They say it’s necessary for national security and water and clean energy infrastructure.

Scientists will get $25 million to study salt lake ecosystems in the drought-stricken U.S. West, as President Joe Biden signed legislation Tuesday allocating the funds in the face of unprecedented existential threats caused by the lack of water.