3 ms·
It's just evidence that keeps the possibility of panspermia open. In the years since the Urey-Miller experiment, all of the bases in DNA/RNA have been shown to
by throwup238 2y ago
It's just evidence that keeps the possibility of panspermia open.
In the years since the Urey-Miller experiment, all of the bases in DNA/RNA have been shown to form in a huge variety of conditions, many of which would have been present before the oceans even fully condensed so its not considered a goldilocks problem anymore. On top of that, it looks more and more likely that some sort of extremophile archae that would have evolved in those extreme conditions are the common ancestors of life instead of a branch that evolved separately.
Panspermia is possible but there's plenty of evidence that life emerged on earth without external help.
- dmbche 2y agoCan you point me.to something about the extrmophile archae hypothesis?
- morphle 2y agoI haven't found the specific paper you ask for, but here are some points to start searching: https://scholar.google.com/scholar?hl=en&as_sdt=0%2C5&q=extrmophile+archae+hypothesis&btnG= https://scholar.google.com/scholar?hl=en&as_sdt=0%2C5&q=extr... https://citeseerx.ist.psu.edu/document?repid=rep1&type=pdf&doi=fc5b9ce982a33aff24c899db4421daf9d8c53efc https://citeseerx.ist.psu.edu/document?repid=rep1&type=pdf&d... A crucial insight: Amino acids are part of a group of reactions of molecules of life that happen spontaniously: https://youtu.be/Lh98fyNtPKM?t=1866 https://youtu.be/Lh98fyNtPKM?t=1866 https://www.youtube.com/watch?v=PhPrirmk8F4 https://www.youtube.com/watch?v=PhPrirmk8F4
- dmbche 2y agoThank you very much!
- morphle 2y agohttps://www.researchgate.net/profile/Elena-Pikuta/publication/7553618_The_Effect_of_Sodium_Salts_and_pH_on_the_Hydrogenase_Activity_of_Haloalkaliphilic_Sulfate-Reducing_Bacteria/links/0912f500dafeb117a2000000/The-Effect-of-Sodium-Salts-and-pH-on-the-Hydrogenase-Activity-of-Haloalkaliphilic-Sulfate-Reducing-Bacteria.pdf https://www.researchgate.net/profile/Elena-Pikuta/publicatio...
- throwup238 2y agoSee the sources here: https://en.wikipedia.org/wiki/Last_universal_common_ancestor#An_anaerobic_thermophile https://en.wikipedia.org/wiki/Last_universal_common_ancestor...
- jononomo 2y agoFrom my understanding, no one has any idea how life could possibly have emerged on Earth without external help. The only evidence they have that it did is that all other alternatives seem even less plausible to them. The corrective to this is for them to question their assumptions. I recommend the book The Stairway to Life: An Origin-of-Life Reality Check by Tan & Stadler.
- throwup238 2y agoThat's like the intelligent design argument. If life couldn't form on Earth without external help, how did it form anywhere else without external help? It makes no sense. Turns out we do have an idea: Amino acids, nucleotides, and lipids have all been experimentally shown to spontaneously form and assemble in extreme environments. They were forming and bubbling around before the oceans even stopped boiling. After hundreds of millions if not billions of years of bumping around, they finally assembled into something that could self replicate an encapsulated cell and life took off. It's a lot more plausible the same way that general relativity is more plausible than Ptolemiac astrophysics.
- jononomo 2y agoI'm sorry but "life spontaneously formed" is just a mystical philosophy that you hold without any basis in reason or evidence.
- deleted 2y ago[deleted]
- dogma1138 2y agoI would say that this makes panspermia less likely as it suggests that the components for life emerge everywhere so they aren’t that rare to require a transportation mechanism.