via gizmodo.com Rat poison. Lighter fluid. Battery acid. Pesticides. And now...radiation. What do they all have in common? They're all rolled into one cancer causing cigarette. What's worse, tobacco companies have known that radiation was inside cigarettes but hid evidence of it for 4 decades. The radioactive substance found in cigarettes is polonium-210, a radioactive material that "emits hazardous particles called alpha particles". Whens smokers inhale, the particles work with the other carcinogens found in cigarettes to pull double duty in damaging the lungs (and creating cancer).