Labels:bulletin board | monitor OCR: There is fossil evidence that there was some form of life on Earth about three and a half billion years ago This may have been only 500 million years after the Earth became stable and cool enough for life to develop But life could have taken 7 billion years to develop and still have left time to evolve to beings like us who could ask about the origin of life If the probability of life developing on a given planet is very small why did it happen on Earth in about one fourteenth of the time available?
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