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The top documents tagged [years agoearth]
Chapter 26 Early Earth and the Origin of Life. Major events in earth’s history:
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Global Warming
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I. Early Life on Earth Earth formed about 4.6 billion years ago Earth was very hot Atmosphere - little Oxygen. Mostly water vapor, CO, CO 2, and N 2
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Primates
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Global Warming
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Global Warming
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