When did Horizon Season 56 Episode 4 air?
Horizon Season 56 Episode 4 aired on July 16, 2019.
Horizon
Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before.
Season 56 · Episode 4
Inside the Social Network: Facebook's Difficult Year
Jul 16, 2019·1h
Following the teams inside Facebook, revealing a hidden technological playground. The film tackles difficult questions, like how our data is used, and also shows how Facebook works.
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How long is Horizon Season 56 Episode 4?
This episode runs for approximately 60 minutes.
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