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It may not need to migrate. At some point between the Big Bang and now, the entire universe was habitable. Temperatures between 0C and 100C would have been the

It may not need to migrate. At some point between the Big Bang and now, the entire universe was habitable. Temperatures between 0C and 100C would have been the norm for some period, and the universe would have been much smaller than today. If RNA originated during that period, life may just be almost everywhere.

ahazred8ta 3y ago
> Temperatures between 0C and 100C At that time in the early universe, there were no carbon, oxygen, or nitrogen atoms, and no planets with water. Life could only get started several million years after the first supernovas made heavy atoms.
- bediger4000 3y ago
  Alas, this is disputable: https://arxiv.org/1312.0613 https://arxiv.org/1312.0613
  - appplication 3y ago
    Link seems to be incorrect
    - umeshunni 3y ago
      https://arxiv.org/abs/1312.0613 https://arxiv.org/abs/1312.0613
  - ahazred8ta 3y ago
    How so? The 0°-100° era was between 10 and 17 million years after the Big Bang. There were no stars or planets during this period. There were no primordial elements heavier than lithium. Heavier elements were not created until several hundred million years later, after the first supernovas. "At some point around 200 to 500 million years, the earliest generations of stars and galaxies form" -- Before that, there were no oxygen atoms. The guy who wrote that arxiv paper did not know that there were no heavy elements. Please explain what process you think created oxygen atoms before 10My. https://en.wikipedia.org/wiki/Chronology_of_the_universe#The_Dark_Ages_and_large-scale_structure_emergence https://en.wikipedia.org/wiki/Chronology_of_the_universe#The...
    - dekhn 3y ago
      "The guy" is a well known astrophysicist (astrophysicists frequently refer to anything othe than Hydrogen and Helium as "metals"). his article starts out saying early supernovas (very, very early) would be required and the stars would need to be enormous. He cites various estimates of the early universe to support this.

ahazred8ta 3y ago

> Temperatures between 0C and 100C At that time in the early universe, there were no carbon, oxygen, or nitrogen atoms, and no planets with water. Life could only get started several million years after the first supernovas made heavy atoms.

bediger4000 3y ago
Alas, this is disputable: https://arxiv.org/1312.0613 https://arxiv.org/1312.0613
- appplication 3y ago
  Link seems to be incorrect
  - umeshunni 3y ago
    https://arxiv.org/abs/1312.0613 https://arxiv.org/abs/1312.0613
- ahazred8ta 3y ago
  How so? The 0°-100° era was between 10 and 17 million years after the Big Bang. There were no stars or planets during this period. There were no primordial elements heavier than lithium. Heavier elements were not created until several hundred million years later, after the first supernovas. "At some point around 200 to 500 million years, the earliest generations of stars and galaxies form" -- Before that, there were no oxygen atoms. The guy who wrote that arxiv paper did not know that there were no heavy elements. Please explain what process you think created oxygen atoms before 10My. https://en.wikipedia.org/wiki/Chronology_of_the_universe#The_Dark_Ages_and_large-scale_structure_emergence https://en.wikipedia.org/wiki/Chronology_of_the_universe#The...
  - dekhn 3y ago
    "The guy" is a well known astrophysicist (astrophysicists frequently refer to anything othe than Hydrogen and Helium as "metals"). his article starts out saying early supernovas (very, very early) would be required and the stars would need to be enormous. He cites various estimates of the early universe to support this.