Season 38 · Episode 5 of 11
Aired Feb 22, 2001
Snowball Earth
Thu, Feb 22, 2001
Streaming on PBS
0 of 11 watched this season
The controversial theory that for millions of years the Earth was plunged into catastrophe - entirely smothered in ice up to one kilometre thick.
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Airs
Thu, Feb 22, 2001
Show
Horizon
1174 episodes
Episode
S38 · E5
in Horizon