A forgotten prisoner. A velvet mask. A secret so dangerous, it vanished behind locked doors for 34 years. Dive into the real mystery of the Man in the Iron Mask—no fiction required.


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Conspiracy Theories About US Presidents You Never Knew About

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!