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What Was Earth Like 4 Billion Years Ago?

What Was Earth Like 4 Billion Years Ago?

History of the Earth via YouTube Direct link

The Canadian Shield

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1 of 5

The Canadian Shield

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What Was Earth Like 4 Billion Years Ago?

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  1. 1 The Canadian Shield
  2. 2 The Volcano
  3. 3 Acid Rain
  4. 4 Turbulent Mantle
  5. 5 Plate Tectonics

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