Horizon
Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before.
Season 9 · Episode 18 ·
Sorry I Opened My Mouth
Horizon reports on modern research in the prevention of tooth decay.
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Episode 18 of season 9 of Horizon: “Sorry I Opened My Mouth”. Aired 1972-06-12. Watch it online free on ZapFlix.