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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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
Caused not only metabolic transition but mass extinction