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  1. LUCA is not thought to be the first life on Earth, but rather the only type of organism of its time to still have living descendants. In 2016, M. C. Weiss and colleagues proposed a minimal set of genes that each occurred in at least two groups of Bacteria and two groups of Archaea.

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  3. 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.

  4. 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.

  5. Sep 19, 2022 · The origin of life on Earth stands as one of the great mysteries of science. To find out if we are alone in the galaxy, we will need to better understand what geochemical conditions nurtured the first life forms.

  6. The origin of life on Earth is a scientific problem which is not yet solved. There are many ideas, but few clear facts. [1] Most experts agree that all life today evolved by common descent from a single primitive lifeform. [2]

  7. The earliest time that life forms first appeared on Earth is unknown. Life forms may have existed as early as 4.28 billion years ago, not long after the oceans were formed 4.41 billion years ago. That is not long after the formation of the Earth 4.54 billion years ago.

  8. Sep 1, 2009 · The actual nature of the first organisms and the exact circumstances of the origin of life may be forever lost to science. But research can at least help us understand what is possible.

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