A new existential risk that I was unaware of. Reading this forum is not good for peaceful sleeping. Anyway, a reflexion jumped to me. LUCA lived around 4 billion years ago with some chirality chosen at random. But, no doubt that many things happened before LUCA and it is reasonable to assume that there was initially a competition between right-handed protobiotic structures and left-handed ones, until a mutation caused symmetry breaking by natural selection. The mirrored lineage lost the competition and went to extinction, end of the story. But wait, we speak about protobiotic structures that emerged from inert molecules in just few millions years, that is nothing compared to 4 billions years. Such protobiotic structures may have formed continously, again and again, since the origin of life, but never thrived because of the competition with regular, fine-tuned, life. If my assumption is right, there is some hope in that thought. Maybe mirrored life doesn’t stand a chance against regular life in real conditions (not just lab). That being said, I would sleep better if nobody actually tries to see.
Deterministic mechanisms for the production of non-racemic mixtures from racemic starting materials include: asymmetric physical laws, such as the electroweak interaction (via cosmic rays) or asymmetric environments, such as those caused by circularly polarized light, quartz crystals, or the Earth’s rotation, β-Radiolysis or the magnetochiral effect. The most accepted universal deterministic theory is the electroweak interaction. Once established, chirality would be selected for.
A new existential risk that I was unaware of. Reading this forum is not good for peaceful sleeping. Anyway, a reflexion jumped to me. LUCA lived around 4 billion years ago with some chirality chosen at random. But, no doubt that many things happened before LUCA and it is reasonable to assume that there was initially a competition between right-handed protobiotic structures and left-handed ones, until a mutation caused symmetry breaking by natural selection. The mirrored lineage lost the competition and went to extinction, end of the story. But wait, we speak about protobiotic structures that emerged from inert molecules in just few millions years, that is nothing compared to 4 billions years. Such protobiotic structures may have formed continously, again and again, since the origin of life, but never thrived because of the competition with regular, fine-tuned, life. If my assumption is right, there is some hope in that thought. Maybe mirrored life doesn’t stand a chance against regular life in real conditions (not just lab). That being said, I would sleep better if nobody actually tries to see.
Not necessarily: https://en.wikipedia.org/wiki/Homochirality#Deterministic_theories
E.g.
Thanks for this precision, That’s interesting.