Fifteen states including Colorado sued the Trump administration Friday to block cuts to a billion-dollar school mental health grant program established after the Parkland shooting.

Conservationists across South America are replanting the Amazon through indigenous-led agroforestry, ecotourism, seed-dispersal projects, and satellite monitoring to combat decades of deforestation.

News of Lt. Col. George Armstrong Custer's defeat at the Battle of the Greasy Grass in Montana shocked Americans during the nation's centennial celebration in 1876, with Colorado newspapers calling for volunteer forces to fight the Lakota Sioux.

A black hole is an object so massive and dense that even light cannot escape its gravity.

Governor Edwin Johnson deployed the Colorado National Guard to the state's southern border in 1936 to turn away jobless migrants during the Great Depression.

Health insurance premiums on the Affordable Care Act Marketplace are expected to jump another 14% in 2027, marking the second consecutive year of double-digit increases for Colorado consumers.

Three million people lost health insurance coverage nationwide after Congress let enhanced premium tax credits expire, with Colorado facing additional cuts to Medicaid services starting in January.

Climate change could nearly double household water bills in some U.S. cities, forcing low-income residents to choose between water and other necessities, Stanford researchers warn.

North Dakota's 988 crisis hotline is overwhelmed with calls, forcing many to national backup centers instead of local responders who can dispatch mobile crisis teams to rural areas.

House Democrats say FEMA is illegally withholding $200 million in counterterrorism grants unless states adopt election administration changes that conflict with federal court rulings.