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Environmental History in a Nutshell

Geologic Time. Pretend the age of the earth (4.5 billion years) is compressed into one calendar year.January 1 - Earth and planets formedEarly March - liquid water stands in pools.Late March - earliest lifeJuly - oxygen is important part of atmosphereOctober 25 - multicellular organismsLate

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Environmental History in a Nutshell

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