For decades, Big Tobacco denied the truth, manufactured doubt, and hooked generations on addiction—how a deadly industry hid smoking’s risks for over 70 years while profits soared.




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Why is There a City for 20,000 People Under Turkey?

Decoding The Unknown explores history's deepest mysteries to see if we can draw any conclusions about what actually happened. Russian hikers killed by a yeti? Aircraft lost to sea monsters? Probably not, so let's try and figure out what really happened. New episodes every Friday. Also on YouTube!