Experts say radon, a radioactive gas trapped under homes, is a leading cause of lung cancer; mitigation systems and testing ...

Earth's orbital environment is becoming increasingly crowded. Thousands of satellites—many of them inactive, damaged, or out of fuel—now circle the planet alongside fragments of debris from past ...

Longmont and Denver transit users are frustrated that RTD’s $5.5 billion FasTracks plan hasn’t delivered a commuter rail for northwest metro communities or reliable bus service near the city center.

BUSAN, South Korea (AP) — President Donald Trump appeared to suggest the U.S. will resume testing nuclear weapons for the first time in three decades, saying it would be on an “equal basis” with ...

President Donald Trump announced on Oct. 29 that the United States will "immediately" resume nuclear weapons tests, a move he said is needed to ensure the country keeps up with its rival nuclear ...

The president's announcement that the U.S. would resume tests leaves questions. President Donald Trump raised questions Wednesday night about a decades-old U.S. prohibition on testing its nuclear ...

Hours prior to his meeting with Chinese President Xi Jinping, U.S. President Donald Trump posted on social media, “Because of other countries testing programs, I have instructed the Department of War ...

DENVER (KDVR) — As of Wednesday, the Regional Transportation District’s Transit Police Department Detective Bureau officially rolled out and became operational. The new branch of RTD will allow for ...

Getting your Trinity Audio player ready... RTD directors faced a barrage of public opposition, then made controversial decisions late Tuesday to restructure the agency’s Access-on-Demand service, ...