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    a·bi·o·gen·e·sis
    [ˌāˌbīōˈjenəsəs]
    noun
    abiogenesis (noun)
    1. the original evolution of life or living organisms from inorganic or inanimate substances:
      "to construct any convincing theory of abiogenesis, we must take into account the condition of the Earth about 4 billion years ago"
    2. historical
    Origin
    late 19th century: from a- ‘not’ + Greek bios ‘life’ + genesis.
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    In biology, abiogenesis (from Greek ἀ- a- 'not' + βῐ́ος bios 'life' + γένεσις genesis 'origin') or the origin of life is the natural process by which life has arisen from non-living matter, such as simple organic compounds.
    en.wikipedia.org/wiki/Abiogenesis
    A deconstructionist perspective asks what can be inferred about abiogenesis on the basis of the biology of contemporary life forms. The two approaches then can be used in conjunction in an effort to gain leverage on the difficult problem of the origin of life.
    link.springer.com/chapter/10.1007/978-3-030-01869-6_5
    A significant milestone in the field came in the 1920s with the work of Haldane and Oparin, where they both theorized that organic molecules could arise in a reducing atmosphere and the presence of external energy sources. Their work formed the basis of subsequent studies on the theory of abiogenesis.
    www.news-medical.net/life-sciences/What-is-the-Theory-…
    Some scientists also question whether abiogenesis is a valid theory, but they have been unable to propose a better alternative. How life might have originated was first proposed by Russian scientist Alexander Oparin in 1924 and independently again by British biologist J.B.S. Haldane in 1929.
    sciencing.com/abiogenesis-definition-theory-evidence-ex…
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    Abiogenesis - Wikipedia

    In biology, abiogenesis (from Greek ἀ- a- 'not' + βῐ́ος bios 'life' + γένεσις genesis 'origin') or the origin of life is the natural process by which life has arisen from non-living matter, such as simple organic compounds. The prevailing scientific hypothesis is that the transition from non-living to living entities … See more

    Life consists of reproduction with (heritable) variations. NASA defines life as "a self-sustaining chemical system capable of See more

    Producing a habitable Earth image
    Pre-1960s conceptual history image

    Evolutionary history
    Early universe with first stars
    Soon after the Big Bang, which occurred roughly 14 Gya, the only chemical elements present in the universe were hydrogen, helium, and lithium, the three lightest atoms in … See more

    Producing suitable vesicles image
    Producing biology image

    Energy and entropy
    Life requires a loss of entropy, or disorder, when molecules organize themselves into living matter. The … See more

    Suitable geological environments image
    Overview image

    Spontaneous generation
    One ancient view of the origin of life, from Aristotle until the 19th century, is of spontaneous generation. This theory held that "lower" animals … See more

    Producing molecules: prebiotic synthesis image

    All chemical elements except for hydrogen and helium derive from stellar nucleosynthesis. The basic chemical ingredients of life – the See more

    The lipid world theory postulates that the first self-replicating object was lipid-like. Phospholipids form lipid bilayers in water while under … See more

    A variety of geologic and environmental settings have been proposed for an origin of life. These theories are often in competition with one … See more

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  5. Abiogenesis | Definition & Theory | Britannica

  6. What is the Theory of Abiogenesis? - News-Medical.net

    WebFeb 1, 2023 · The theory of abiogenesis posits that the first lifeforms which arose from the primordial soup were simple organisms that gradually …

  7. Abiogenesis - Definition and Theory | Biology Dictionary

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