Let’s keep things simple two rules.

  • No giving sentience, This is a no brainer issue.
  • Let’s keep it to beings under the Animilia kingdom. “mutated virus/bacteria” is a common trope.

To start:

Let’s modify ants to have lungs.

Most insects are constrained by the amount of oxygen they can acquire through their exoskeleton.

Imagine how big they can get if they didn’t have that constraint?

  • Remy Rose@piefed.social
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    3 hours ago

    Ok, take this with a grain of salt because I read about it ages ago in a dubious pop-sci book and my memory is shaky. One time, they tried to gene edit yeast to be able to survive much higher alcohol concentrations. There’s lots of good reasons to want to do this… Beer/wine is just about the strongest beverage you can make without distillation of some kind because the yeast dies. Making way higher ethanol yields just from fermentation makes biofuel way more viable. Stuff like that.

    EXCEPT… It nearly escaped, and was able to survive on it’s own. Yeast is very ubiquitous in nature, so a wild yeast that can tolerate massive ethanol concentrations could conceivably have altered life on earth as we know it.

    A cursory internet search isn’t turning up anything about this, but I’m pretty sure I read it in the book Everything Is Going to Kill Everybody, if anyone wants to look harder than I did.

  • I Cast Fist@programming.dev
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    1 hour ago

    Amaranth that can grow on sand and be watered with seawater

    Edit: ops, only animals? Make bees able to break down any kind of sugar into honey

  • slazer2au@lemmy.world
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    5 hours ago

    Cows now have tetrodotoxin like Fugu fish. Incorrectly prepared cows now have the chance to kill you.

  • makeshiftreaper@lemmy.world
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    5 hours ago

    Both male and female mosquitos now drink blood and they spit some of the last person’s blood in you when they drink, causing them to spread blood borne diseases

  • Im_old@lemmy.world
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    5 hours ago

    Mhh, insects in general IIRC are also constrained by the fact they have exoskeletons: i.e. their internal organs are just in a bag. So they can’t grow too much or they just squish I think.

    Imagine them being able to become vertebrates. You can have insects the size of cats I think before the osmosis breathing tubes they currently have are not a thing. Lungs would be the next thing I guess.

    Disclaimer: I’m not a biologist and just make stuff up from what I remember from high school biology, and it was last millennium!

    • sbv@sh.itjust.works
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      3 hours ago

      According to my sister-in-law’s then boyfriend (who was a biologist or an insect guy or something), spiders and insects can have lung-line organs called book lungs. So they have options. Creepy buggy insecty options.

    • FrostyTrichs@walledgarden.xyz
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      5 hours ago

      Disclaimer: I’m not a biologist and just make stuff up from what I remember from high school biology, and it was last millennium!

      If only the rest of the world was so honest!

  • dontgooglefinderscult@lemmings.world
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    5 hours ago

    Give any animal the ability to photosynthesize. Now animals are of course complex creatures that need a variety of nutrients to function properly, and the number of chemicals we’ve seen be able to be photosynthesized is low, but imagine only needing to nude sunbathe for like a half hour to get enough sugars to fulfill your caloric intake, including the less efficient carb->protein/carb->fat conversion and pop a pill for some vitamins. Imagine if all animals had that as a baseline and just needed to hunt/forage for nutrients and vitamins to support auxillary functions.

    Overpopulation would be nearly impossible despite massive population booms, with the only real limitation being physical space and the social dynamics of any given species or interspecies interactions.

    • verdare [he/him]@beehaw.org
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      5 hours ago

      The reason you don’t really see animals that can photosynthesis (other than microbes) is because you don’t actually get that much energy per unit of area. Think about how much area a cow has to graze vs the surface area of the cow itself. And much of the cow’s surface isn’t even facing the sun.

      • Admetus@sopuli.xyz
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        46 seconds ago

        Not only that but that the energy from the nutrients is solely used for cell growth and maintenance. Even remotely suggesting a self-warming and extremely kinetic mammal can get energy solely from the sun is nuts.

  • thedeadwalking4242@lemmy.world
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    2 hours ago

    Give human level intelligence to gorillas, this is worse then just human level chimpanzees in the fact gorilla’s are beefy and could rip the average human in to pieces. With human level intelligence they would be a force to me reckoned with

  • techwooded@lemmy.ca
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    6 hours ago

    Not very up on biology, so not sure if this would even be a thing, but I would say some kind of internal structure like plants allowing animals to overcome the square-cube law

  • IHave69XiBucks@lemmygrad.ml
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    5 hours ago

    Some common form of bacteria modified to break down plastics rapidly the way they do organic matter. Youd see buildings falling apart, packaging need to be redesigned for everything, electronics rotting, etc.