Bill Bryson Quote

For 2 billion years this is all the life there was on earth, but in that time the stromatolites raised the oxygen level in the atmosphere to 20 percent—enough to allow the development of other, more complex life-forms: me, for instance. My gratitude was real.

Bill Bryson

For 2 billion years this is all the life there was on earth, but in that time the stromatolites raised the oxygen level in the atmosphere to 20 percent—enough to allow the development of other, more complex life-forms: me, for instance. My gratitude was real.

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