Over one million Pet Rocks were sold in 1975, makine Gary Dahl, of Los Gatos, California, a millionaire. He got the idea while joking with friends about his pet that was easy to take care of, which was a rock.

Tobacco contains over 50 chemicals that can cause cancer.

Chicago has the largest cookie factory, where Nabisco made over 4.6 billion "Oreo" cookies in 1997.

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