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Horizon: 2001

38x05 Snowball Earth
TV-PG

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Aired2001-02-22T21:00:00Z on BBC Two
Runtime1h
CountryUnited Kingdom
LanguagesEnglish
GenresDocumentary

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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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