Radon is an odorless, colorless, radioactive gas that is the leading cause of lung cancer for nonsmokers. Experts recommend testing for it in your home —here's how.

Radon has no stable isotopes, but has a host of radioactive isotopes including a very short-lived isotope called thoron (220 Rn, half-life = 55.6 s). In a new study, Guebuem Kim and Yong Hwa Oh of ...