Radon is a colorless, odorless, tasteless - radioactive - gas that seeps up from the ground. That being said, it's easy to either ignore the dangers of long term exposure or freak out about them. But there is a middle ground: check out the Minnesota Health Department's new interactive tools - including maps and charts - to help you get a better idea how prevalent radon is in your county. And another piece of good news: testing is easy, inexpensive and only takes a few days. The Minnesota Department of Health has more information here.