[Attributing the origin of life to spontaneous generation.] However improbable we regard this event, it will almost certainly happen at least once… The time... is of the order of two billion years… Given so much time, the "impossible" becomes possible,… — George Wald Copy Share Image
![“[Attributing the origin of life to spontaneous generation.] However improbable we regard this event, it will almost certainly happen at least once… The time... is of the order of two billion years… Given so much time, the "impossible" becomes possible, the possible probable, and the probable…” quote by George Wald](https://sms4smile.com/quotes/img-quotes/e29/george-wald-9544_billions_attributing-the-origin-of-life-to-sponta_2720904.jpg)