Uncover the bizarre 100-year mystery behind the Black Knight Satellite—from Tesla’s signals to NASA’s photos—and learn why this so-called alien craft is really just a tangled web of myths.


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Operation Majestic 12: The Document Leak That Spawned a Thousand Conspiracy Theories

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!