Cigarettes are known to cause cancer... But we now know there's another reason why... they contain radioactive material, specifically polonium-210! Tobacco companies also have known about it since 1959. As reported in ABC , historical documents reveal tobacco companies not only knew about the radioactive substance, but studied it, then refused to do anything about it! They figured out that: 1) It caused "cancerous growths" in the lungs of smokers, 2) Calculated how much…