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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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Origins of life pre 19 th c
Origins of Life (pre-19th c.)

  • Abiogenesis

  • Heterogenesis



Francisco redi 1668
Francisco Redi (1668)


Lazzaro spallanzani 1768
LazzaroSpallanzani (1768)


Louis pasteur 1864
Louis Pasteur (1864)


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


Darwin
Darwin recover from the mortal blow struck by this simple experiment”


A i oparin david haldane
A.I. recover from the mortal blow struck by this simple experiment”Oparin (& David Haldane)


Primordial soup
Primordial Soup recover from the mortal blow struck by this simple experiment”

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


Stanley miller harold urey 1953
Stanley recover from the mortal blow struck by this simple experiment”Miller (& Harold Urey) 1953


Sidney fox
Sidney Fox recover from the mortal blow struck by this simple experiment”

Origin of

Coacervates (protocells)


Oxygen revolution
Oxygen Revolution recover from the mortal blow struck by this simple experiment”

2.2 bya

Caused not only metabolic transition but mass extinction


Endosymbiont hypothesis margulis 1981
Endosymbiont recover from the mortal blow struck by this simple experiment” Hypothesis (Margulis 1981)


Sexual reproduction
Sexual Reproduction recover from the mortal blow struck by this simple experiment”


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