It just seems like it would be a really cool thing to have gills and be able to populate the oceans in the same way we populate the land. We could have houses and shops and vehicles, andgo on walks/swims and just kind of live underwater.

Start a whole new second species of human here on earth maybe, Who knows?

  • booly@sh.itjust.works
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    11 days ago

    There’s not enough oxygen in water to support our metabolisms, even if we had gills.

    Fish are adapted to conserve and use less oxygen, from slower metabolic rates to more options for anaerobic respiration that doesn’t poison oneself from within.

    • IHave69XiBucks@lemmygrad.ml
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      11 days ago

      Well thats not really the most relevant thing here even if correct because you could give someone gills and let them keep their lungs too just having the gills to extend how long we can dive would be useful

    • Melatonin@lemmy.dbzer0.comOP
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      11 days ago

      I don’t believe this. Sailfish, barracuda, tuna, huge mass, highly active… I’m sure they use a HELL of a lot more oxygen than I do on a good day. Gills extract MORE oxygen than lungs do, they’re more efficient.

      My unscientific opinion tho.

      • booly@sh.itjust.works
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        11 days ago

        This article estimates at a 40kg sailfish uses about 2.7 megajoules per day of energy when hunting. That’s about 650 kcal.

        An 80kg human weighs about twice as much and needs about 3 times the energy, without even exertion.

        Warm blooded animals spend a lot of energy just maintaining body temperature. Plus water doesn’t have very much oxygen in it, compared to the atmosphere.

        • Melatonin@lemmy.dbzer0.comOP
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          11 days ago

          Oh sure, if you’re going to use facts and science we may as well not even talk.

          Seriously though, thanks for the insight.

          • GraniteM@lemmy.world
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            11 days ago

            This is the whole “if humans were going to have wings we’d have to redesign the whole organism from the ground up” fiasco all over again.

  • TootSweet@lemmy.world
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    11 days ago

    Of all the Justice League members you could choose to have the powers of, you chose Aquaman?

  • half_built_pyramids@lemmy.world
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    11 days ago

    Crisper isn’t changing an organism’s genes to that extent. When you’re designing an immune response with rna injection or other changes brought about with cytophages you can only get crispier. It’s sort of like how you can’t double fry fried chicken. It’s already crispy once, it just gets burned and dries out.

    • moonlight@fedia.io
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      11 days ago

      While it’s definitely not possible with current tech, I don’t see why it wouldn’t theoretically be possible. It would be an insanely complex, multi stage process, though.

      • half_built_pyramids@lemmy.world
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        11 days ago

        What, double frying chicken wings?

        Like Icarus, you’re mad with wonder. Do not try it. Do not fly close to the sun of double crispy wings.

  • flashgnash@lemm.ee
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    11 days ago

    Pretty sure you can already get those you just need to have sex with enough siblings and cousins

  • pancake@lemmygrad.ml
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    11 days ago

    Human embryos do have immature gills, but they are reused to create ears, jaw, tonsils, thymus, parathyroids and the large arteries in the neck and upper chest. We could add extra pairs and try to turn them into actual gills, although that would require removing the aortic arch and forcing all blood through the gills. Connecting them to the pulmonary system is not possible, as lungs and gills need different pressures (that’s the whole reason we have two circuits). Maybe we could connect them in parallel to the aorta? That would only work as a backup, but with an adequate vasomotor system could do a nice job!

  • oo1@lemmings.world
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    11 days ago

    Have you been watching a fairly terrible late1990/early2000s tv series starring jessica alba? I’m pretty sure they had some fish-mutants.

    I don’t think you can radically change a human’s environment that much faster than nature, especially not a system so critical as breathing. The whole organism (including the internal microbiome) needs to co-evolve with itself and the ecosystem it is to survive in - to function effectively as an independent organism. I don’t know how long it took cetaceans to evolve, but even they still breathe air at the surface - they’re really just big flappy hippos.

    I’m sure it’s not impossible but I think you’d need, many, maybe thousands of generations for it to become something viable that can effectively provide enough oxygen to the other systems - or more likely adapt all the other systems to less oxygen. So it might have to live basically in a lab / sea-world for centuries. You might need scientists with unusual ethical standards to get to human - but an underwater rat? I’m sure you’d find a few Dr Mephestos out there eager to drown a few thousand of those.

    Source: 100% ignorant opinion.

    • Melatonin@lemmy.dbzer0.comOP
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      11 days ago

      I was just thinking there’s plenty of creatures bigger than us with much more active lifestyles. And gills are kind of self-contained. Just slap them on there and away you go!

      Hypothetically. 100% ignorant opinion as well.

  • Thorngraff_Ironbeard [he/him]@hexbear.net
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    11 days ago

    Its funny I did a paper on CRISPR in highschool and was very interested in the technology and one of the possible uses I mentioned was giving people gills to live underwater.