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  1. 19 Σεπ 2022 · The origin of life on Earth stands as one of the great mysteries of science. Various answers have been proposed, all of which remain unverified. To find out if we are alone in the galaxy, we will need to better understand what geochemical conditions nurtured the first life forms.

  2. Therefore, the earliest time for the origin of life on Earth is at most 3.5 billion years ago, possibly as early as 4.1 billion years ago — not long after the oceans formed 4.5 billion years ago and after the formation of the Earth 4.54 billion years ago.

  3. 31 Αυγ 2016 · Analysis of ancient rocks in Greenland that contain structures interpreted as bacterial in origin suggest that Earth might have been an abode for life much earlier than previously thought.

  4. 20 Αυγ 2018 · Establishing a unified timescale for the early evolution of Earth and life is challenging and mired in controversy because of the paucity of fossil evidence, the difficulty of interpreting it and...

  5. The timeline of the evolutionary history of life represents the current scientific theory outlining the major events during the development of life on planet Earth. Dates in this article are consensus estimates based on scientific evidence, mainly fossils.

  6. The history of life on Earth traces the processes by which living and extinct organisms evolved, from the earliest emergence of life to the present day.

  7. 1 Σεπ 2009 · The earliest forms of life could have been simple membranes made of fatty acidsalso structures known to form spontaneously—that enveloped water and these self-replicating genetic...

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