Horizon
Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before.
Season 10 · Episode 20 ·
How Does It Hurt?
In this episode of Horizon, you will find that many people suffer chronic pain and yet others cannot feel anything.
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Episode 20 of season 10 of Horizon: “How Does It Hurt?”. Aired 1973-07-05. Watch it online free on ZapFlix.