14 October, 11:37
Assume that man's recorded history can be stretched back to 4600 years before the present. this is approximately what fraction of geologic time?
14 October, 11:49
4,600/4,540,000,000 = 0.00000101321
man's recorded history spans about 1/1,000,000 of geologic time (one one millionth)
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» Assume that man's recorded history can be stretched back to 4600 years before the present. this is approximately what fraction of geologic time?