Is Panspermia a Viable Explanation for the Origins of Life?

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Discussion Overview

The discussion revolves around the viability of panspermia as an explanation for the origins of life, specifically focusing on the presence of organic molecules in intergalactic dust and the theoretical implications of such findings. Participants explore the scientific standing of panspermia, contrasting it with other hypotheses like exogenesis, and engage in speculative reasoning about the conditions under which life might arise in the universe.

Discussion Character

  • Exploratory
  • Debate/contested
  • Conceptual clarification

Main Points Raised

  • Some participants note that organic molecules are commonly found in intergalactic dust, suggesting the presence of materials that could potentially support life, but argue that this does not imply the existence of life itself.
  • There is a viewpoint that panspermia is considered fringe, with some participants expressing skepticism about the scientific validity of the theory and its proponents.
  • Others mention research by Carl Gibson and Prof. Chandra Wickramasinghe, which proposes a scenario in which early cosmic conditions could have facilitated the emergence of life, although some participants express uncertainty about this hypothesis.
  • A participant critiques Wickramasinghe's work on panspermia as unfounded and unscientific, contrasting it with more accepted scientific hypotheses.

Areas of Agreement / Disagreement

Participants express a range of views on the scientific credibility of panspermia, with some considering it fringe and others acknowledging it as a possibility worth exploring. There is no consensus on the validity of the theory or the interpretations of the evidence presented.

Contextual Notes

Participants highlight the speculative nature of the discussion, noting that the hypotheses presented lack definitive observational or experimental evidence. The debate also reflects varying levels of acceptance regarding the credibility of certain researchers in the field.

skippy1729
I read somewhere in a popular account of panspermia that astrophysicists have found evidence of organic molecules in intergalactic dust (no references given). I would be interested in more detail about this. Also, is this theory considered fringe or is it still considered seriously? I am talking about a natural dispersal of life, not little green men seeding earthlike planets.

Thanks for any input. Skippy
 
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skippy1729 said:
I read somewhere in a popular account of panspermia that astrophysicists have found evidence of organic molecules in intergalactic dust (no references given). I would be interested in more detail about this. Also, is this theory considered fringe or is it still considered seriously? I am talking about a natural dispersal of life, not little green men seeding earthlike planets.

Thanks for any input. Skippy

The whole thing varies a lot, in all respects. There are lots of 'organic molecules' in dust, that's almost the definition of dust (as apposed to 'gas')---i.e. having carbon compounds and certain carbon/silicate structures. Organic compounds in intergalactic dust doesn't really mean anything in and of itself, except that there are some viable materials out there (hypothetically) to be used for forming life. It says little (to nothing) about whether there is life out there.

Panspermia is pretty fringe. Exogenesis is somewhat fringe, but more just a weird hypothesis that's virtually impossible to test. Unfortunately lots (maybe most) of the panspermia people out there are completely nuts, someone who believes extremely strongly in it is suspect in the first place---because belief in something without evidence is unscientific and therefore very fringe. Acknowledging that panspermia is a possibility, and an interesting idea is not fringe at all.
 
skippy1729 said:
I read somewhere in a popular account of panspermia that astrophysicists have found evidence of organic molecules in intergalactic dust (no references given). I would be interested in more detail about this. Also, is this theory considered fringe or is it still considered seriously? I am talking about a natural dispersal of life, not little green men seeding earthlike planets.

Thanks for any input. Skippy

Zhermes reply covers most of your question, but some research you might be interested in is from Carl Gibson and Prof. Chandra Wickramasinghe. They propose a highly turbulent and energetic early epoch in the universe when trillions of planetary mass blobs of Hydrogen/Helium formed, basically acting as a cosmic incubator for the first life to arise in. Then the proto-planets began merging to form stars while others spread through out the universe, rapidly spreading life through out. I'm not sure I am convinced entirely, but it does make for interesting speculation as to when life began.

some papers on arXiv
 
Thanks to both of you. Skippy
 
qraal said:
some research you might be interested in is from Carl Gibson and Prof. Chandra Wickramasinghe.
That is a good direction from qraal, you can check those out and decide for yourself (they are certainly interesting reads--as qraal said).

Wickramasinghe is exactly who I was referring to about being completely out there. Although he is well known and respected in other fields of (astro)physics for excellent work, I---personally---believe that his panspermia work is completely unfounded, and unscientific and frankly, ridiculous. It's one thing to hypothesize about things that are currently unknown (i.e. there doesn't exist observations or experimental evidence for them---string theory would be a good example), it's another thing to jump from 'a hypothesis' to 'a supposition' to 'a stretch' to 'a wild guess' to what's seems more like a science fiction alternative universe than anything resembling physics... End of rant.
 

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