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Pangaea broke apart about 200 million years ago.
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About 300 million years ago, Earth didn't have seven continents, but instead one massive supercontinent called Pangaea, which was surrounded by a single ocean called Panthalassa.
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Started about 3.8 billion years ago. A prokaryotic cell evolved into fish,and forests and soon life was on earth.
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Cyanobacteria enters the atmosphere causing oxygen to form. This happened 2.4 billion years ago.
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The earth was thought to have been formed 4.6 billion years ago.
