How long has there been life on earth? a. 4.6 billion years, b. 3.7 billion years, c. 65 million years, d. 3 million years
There has been life on Earth for about 3.7 billion years.
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Janet17|Points 20559|
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Asked 12/18/2015 5:15:30 PM
Updated 12/18/2015 8:44:10 PM
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