Original title
History's Secrets
Released
-
Origin country
US
Genre
Documentary
Production companies
National Geographic
Status
Ended
Number of seasons
4
Number of episodes
27
Mysterious events, compelling figures and great unanswered questions from the past are explored, with a focus on the reclusive billionaire Howard Hughes; the CIA's top-secret experiments; the Unabomber and; little known stories from NASA's Apollo missions.
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