Present to 800 Million Years Ago
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900 Million to 1.6 Billion Years Ago
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1.7 Billion to 2.1 Billion Years Ago
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2.2 Billion to 2.7 Billion Years Ago
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2.8 Billion to 3.4 Billion Years Ago
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3.5 Billion to 4.0 Billion Years Ago
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4.1 Billion to 4.6 Billion Years Ago
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