Horizon
Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before.
Season 28 · Episode 8 ·
The Day the Earth Melted
This episode of Horizon examines 20 years of research which has led to a new theory on how the earth's crust was made.
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Episode 8 of season 28 of Horizon: “The Day the Earth Melted”. Aired 1991-02-25. Watch it online free on ZapFlix.