If you've tested your home for radon and found elevated levels, you're probably asking the same question most homeowners ask: does radon mitigation actually work, or is it just expensive ...

You’ve probably heard of carbon monoxide and smoke detectors, but there’s another invisible threat that might be lurking in ...

In North Dakota, 63% of homes have an elevated radon level above the U.S. Environmental Protection Agency’s Action Level of 4.0 picocuries per liter.

This article is co-published with ProPublica, a nonprofit newsroom that investigates abuses of power. About 5 billion years ago, stars merged and exploded, creating uranium that eventually became ...