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Watch How the Earth Was Made Season 2 Episode 12 Online

  • 7.6/10
  • COUNTRIES: United States of America,United Kingdom
  • Subtitles: English

A look at past Ice Age eras that Earth has experienced throughout its existence; how the slightest changes in the planet's orbit and angle of rotation can bring them about; how long they can last, and when the Earth will endure another.