We're all exposed to tiny levels of radiation, but a blast of it can leave you in agony -- that is, if it doesn't kill you outright. What is it, what causes it and how can we treat it?
We live in a radioactive world, and we're not just talking about the times when a nuclear plant is melting down and scaring the heck out of us. How much do you know about the ABGs (or alphas, betas and gammas) of nuclear radiation? See more »
British authorities have found traces of polonium-210 in at least five buildings and three British Airways jets since Alexander Litvinenko fell ill. See more »