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Where Does Life Come From?

Where Does Life Come From?. Origins of Life (pre-19 th c.). Abiogenesis. Heterogenesis. Lao-Tzu. Francisco Redi (1668). Lazzaro Spallanzani (1768). Louis Pasteur (1864).

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Where Does Life Come From?

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  1. Where Does Life Come From?

  2. Origins of Life (pre-19th c.) • Abiogenesis • Heterogenesis

  3. Lao-Tzu

  4. Francisco Redi (1668)

  5. LazzaroSpallanzani (1768)

  6. Louis Pasteur (1864)

  7. “Never again will the doctrine of spontaneous generation recover from the mortal blow struck by this simple experiment”

  8. Darwin

  9. A.I. Oparin (& David Haldane)

  10. Primordial Soup 4.4 bya Oceans have pH of 5.8 Present: CH4, NH3, H2O, H2S, CO2, CO Absent: O2 or O3 Highly reducing atmosphere leads to synthesis of amino acids

  11. Stanley Miller (& Harold Urey) 1953

  12. Sidney Fox Origin of Coacervates (protocells)

  13. Oxygen Revolution 2.2 bya Caused not only metabolic transition but mass extinction

  14. Endosymbiont Hypothesis (Margulis 1981)

  15. Sexual Reproduction

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