Comment on Extremely common red dwarf L

• zout@fedia.io ⁨1⁩ ⁨month⁩ ago

  Purple earth hypothesis suggests that early photosynthesis wasn't chlorophil based, but on a simpler molecule (retinal) which is purple colored. The Canfield ocean was supposed to have followed this time yielding a turquoise life, where the ocean was anoxic and sulfidic. That was then replaced during the great oxigenation event which lead to the current green earth.

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  • lugal@sopuli.xyz ⁨1⁩ ⁨month⁩ ago

    Ok, I’ve heard about purple earth, just didn’t know the name. And Canfield ocean was the period after or is it an alternative history idea?

    Either way, that’s not what I meant to say. People say that the brightness of the star and the distance (see habitable zone) and the main biological atom (in our case cabin) and the combination of DNA and RNA are all essential. Changing just one aspect will have devastating effects and make life impossible. But what if Red Dwarfs have a different habitable zone if you use other main atoms and molecules? Maybe there are other energy sources so the star isn’t that important anyway.

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