• sp3ctr4l@lemmy.zip
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      10 months ago

      Recent studies have it at closer to 92% ‘junk’ DNA, and 8% actively coding.

      Also, a lot of non-coding DNA does actually serve other useful functions, it just doesn’t actively code.

      It could play a role in epigenetics, ie the regulation of what active coding sequences are active and when, it could be telomeres that prevent DNA strands from unravelling at the ends, it could be binding and scaffold sites that assist in the structural stability and integrity of the chromosome.

      DNA can be functional, without being active-coding.

      Only regions that are both non coding and also totally non functional are truly ‘junk’, but we keep consistently finding more ways that ‘non functional’ regions are actually functional.

  • Dyskolos@lemmy.zip
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    10 months ago

    That our species took millions of years of evolution and the chance for it to be exactly this way was so infinitesimal… And yet here we are, chasing arbitrary numbers on paper-slices and in some bank-account while also being sexists, racists, whatever-ists and destroying the very rock we exist on. Yet things like star trek are called utopia not actual-ia.

    This always baffle me.

    • CanadaPlus@lemmy.sdf.org
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      10 months ago

      Yes, but have you considered [INSERT OUTGROUP] are bad? /s

      To play devil’s advocate, considering that in evolutionary terms we just left the trees now, we’re doing okay, honestly. I just don’t know if it will be enough.

      • Dyskolos@lemmy.zip
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        10 months ago

        If you’d consider this broadly points at everything “ok”, I’d frigging fear your “moderately bad” 😁

        • CanadaPlus@lemmy.sdf.org
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          10 months ago

          Moderately bad would be, for example, getting stuck in the agrarian neolithic for geological time because every significant technological advance leads to a devastating social collapse that wipes it away. If farming is already a new thing to the species, why shouldn’t we struggle just to keep it going at a basic level?

          I mean, technologies getting lost did happen all the time, and social progress basically didn’t exist until recently. But, progress in both senses eventually came. By the 20th century there was little anyone from the paleolithic would recognise in Western life, and we adapted, with only a few health and demographic problems to show for it.

          • Dyskolos@lemmy.zip
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            10 months ago

            Besides my point being not totally serious, you’re right. Technically. Yet big changes were always at the doorstep and could happen. I just highly doubt the current capitalism-era could ever end. There might be tiny revolts here and there, but there would be so many concurrently happening events needed it seems impossible. Also there’s no viable alternative. At least none everyone sees. Anyhow, I’d say it’s a bit too complex for a discussion in text-form.

            • CanadaPlus@lemmy.sdf.org
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              10 months ago

              Hah, I actually make a lot less sense when not in text form. I can write, reorder and edit a bunch on here. IRL my very first communication idea comes out, and it’s stupid.

              I know this is .ml, but I don’t really expect a global revolution either. Then again, the UK never had a (successful) revolution, and their monarch is just a figurehead at this point, so I still expect change, good or bad.

  • eponymous_anonymous@sh.itjust.works
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    10 months ago

    Retinal photosynthesis, also known as the Purple Earth Theory. Colours are weird. Earth plants absorb red and blue light, they look green to us because that’s the wavelength of light that cannot be used by the chloroplasts.

    It’s hypothesized that this was advantageous on Earth because blue light goes further into water than the other wavelengths, facilitating the development of photosynthetic algae

    Retinal photosynthesis is another viable chemical chain reaction that could be used to create ATP (usable biological energy) from light.

    It’s another molecule similar to chlorophyll, but it absorbs green light instead of red/blue - alien planets might be purple!

    There’s a viable parallel evolutionary pathway that leads to plants with magenta leaves

    • CanadaPlus@lemmy.sdf.org
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      10 months ago

      Actually, there’s some contradicting evidence that came up recently-sh. If you factor in the challenge of not being fried by the very incoming light you need, every photosynthesiser is about the right colour for it’s environment.

      By that, alien planets would be coloured depending on their star type, and the ancient cyanobacteria of Earth were probably green too.

    • Hugin@lemmy.world
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      10 months ago

      So humans vision is much more sensitive to green than other colors. it’s why camera sensors are 50% green 25% red 25% blue. Which makes sense as being able to detect small differences in plant cover is useful in both detecting predators and prey.

      https://en.m.wikipedia.org/wiki/Bayer_filter

      If humans had more flat color detection range we woulda actually be able to see that the sky is purple and not blue.

    • badcommandorfilename@lemmy.world
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      10 months ago

      Tegmark’s MUH is the hypothesis that our external physical reality is a mathematical structure.[3] That is, the physical universe is not merely described by mathematics, but is mathematics — specifically, a mathematical structure.

      Look, I only heard about this concept, so maybe there’s more to it, but branches of mathematics are just a set of rules that we create.

      Sometimes these rules can be applied to real systems, in our reality, and that helps to describe and understand the universe.

      But it’s totally possible to come up with infinite nonsensical, useless mathematical systems that have nothing to do with the universe. The existence of these doesn’t mean that we have or could rewrite reality.

      • tetris11@lemmy.ml
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        10 months ago

        If our universe is bound by the laws of mathematics (big IF), then any theorem discovered within it has to be consistent or incomplete w.r.t it.
        If a theorem is discovered that upends math as we know it, then the repercussions could be cosmic.

        Again, big if about the universe being bound by the laws of maths

        • Clent@lemmy.dbzer0.com
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          10 months ago

          Discovery a truth of the universe is not going to affect the truth of the universe.

          You’re appearing to claim something nonsensical. The sort of wow-bang nonsense one reads about in pop-science magazines.

          • tetris11@lemmy.ml
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            10 months ago

            (I’m going to abrasively emphasize the conjunctions more, because I feel they’re being glossed over)

            IF the truths of our universe are completely mathematically and axiomatically bound, THEN any proof derived within it might have a chance of upsetting a given axiom given the either incomplete or inconsistent nature of mathematics as declared by Gödel, the ramifications of which COULD be dire in such a universe.

            I’m NOT saying our universe IS mathematically bound. I’m also NOT saying that a newly discovered universal axiom WILL change the structure of such a universe.

            I actually believe that maths merely describes our reality at varying scales.

            I am presenting an interesting idea that for some reason is being taken quite literally, and now am having to get defensive about it as if it’s a deeply-held belief of mine…

            • superkret@feddit.org
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              10 months ago

              Yes, we understood what you were saying.
              But your IF is followed by a nonsensical statement.
              It’s a precondition that can’t be true.

  • spittingimage@lemmy.world
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    10 months ago

    The fact that planes are kept in the air by the shape of their wings, which forces air to go over at a pace when it can’t push down on the wing as hard as it can push up from underneath. It’s like discovering an exploitable glitch in a videogame and every time I fly I worry that the universe will get patched while I’m at 10,000 feet.

    • flubba86@lemmy.world
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      10 months ago

      I remember reading a couple years ago that’s not actually how plane wings work. The actual way is much more complicated and hard to explain and hard to teach, so they just teach it this way because its an intuitive mental model that is “close enough” and “seems right”, and it really doesn’t matter unless you’re a plane wing designer.

      • CanadaPlus@lemmy.sdf.org
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        10 months ago

        The false thing they teach is that air has to go over the longer side faster. Actually, it’s under no obligation to meet back with the same air on the other side, and doesn’t in practice. The real magic bit is the corner on the back, which is not aerodynamic and “forces” air to move parallel to it (eventually, as the starting vortex dissipates).

        The pressure difference from different volumetric flow speeds is real, it’s just not that straightforward to produce, because air mostly does whatever it wants. A lot of aerodynamics is still more art than science, and it’s even possible the Navier-Stokes equations it’s based on fail under certain conditions.

      • Zak@lemmy.world
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        10 months ago

        The basic way an airplane works actually is simple and intuitive: it meets the air at an angle and deflects it downward. The equal and opposite reaction to accelerating that mass of air is an upward force on the wing.

        There is, of course a whole lot of finesse on top of that with differences in wing design having huge impacts on the performance and handling of aircraft due to various aerodynamic phenomena which are anything but simple or intuitive. A thin, flat wing will fly though, and balsa wood toy airplanes usually use exactly that.

        https://en.wikipedia.org/wiki/Lift_(force)#Simplified_physical_explanations_of_lift_on_an_airfoil

  • Thorry84@feddit.nl
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    10 months ago

    A Planck length is the smallest length possible, a smaller length simply can’t exist.

    At least that’s what scientists believed until they studied OPs penis, then they found out something smaller does in fact exist.

  • latenightnoir@lemmy.world
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    10 months ago

    For me, it’s the sheer scale of celestial bodies.

    Our Sun is humongous. UY Scuti’s radius is 1700 times larger - 185300 times larger than the Earth’s. And then there’s TON 618, which has a mass 66 billion times larger than our Sun’s.

    And even those are barely grains of sand when compared to solar and galactic structures… It is humbling, to say the least.

    Edit 2: I deleted the previous edit, because my first observation is correct (scale is maintained when going from comparing radii to comparing diameters…), which is why I have an Arts degree.

      • latenightnoir@lemmy.world
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        10 months ago

        Ooh, those aspects are well beyond my capacity for comprehension or visualisation! I feel like an ant watching nuclear explosions.

  • FeelzGoodMan420@eviltoast.org
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    10 months ago

    When the moon is at its farthest orbit from earth, all of the planets in the solar system can fit in between earth and the moon.

    • Janovich@lemmy.world
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      10 months ago

      Just in general how spread apart everything is in space is wild. As big as planets and stars are, there’s still unfathomably more nothing in between them all. And that’s in a solar system where it’s comparatively “dense” compared to interstellar space let alone intergalactic. It makes the vastness of the ocean look tiny.

  • ThatWeirdGuy1001@lemmy.world
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    10 months ago

    The fact that there is no discernable difference between an alive body or a dead body when it comes to chemical makeup.

    All the pieces are there. All the atoms and molecules are still in the same places. Yet despite this the body is still dead.

    • Dr. Quadragon ❌@mastodon.ml
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      10 months ago

      @ThatWeirdGuy1001 That’s because it’s not only ingredients that are important but order, relation and interaction between them also is. Hypthetically, in terms of *elements*, in a closed system, the engine that has burned through its fuel is no different than a freshly fueled one. But the engine has reordered them in order to extract some energy. So they are not chemically the same, strictly speaking.

      @TehBamski

    • LouNeko@lemmy.world
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      10 months ago

      To be fair, a perfectly fine but dead body is impossible to observe since the process of dying is usually the result or accumulation of injuries or disfunctions. For this experiment you either have to kill somebody without altering their body in the slightest or instantly conjure a perfectly intact body without any life in it.

    • CarrotsHaveEars@lemmy.ml
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      10 months ago

      When you say “All the atoms and molecules are still in the same places”, I can’t say I agree. It is the change of chemical composition that renders our body dead. Or should I say, death is defined to be such a chemical composition.

  • Darren@sopuli.xyz
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    10 months ago

    I dunno whether it counts: but that science has effectively cured AIDS.

    In 2004, 2.1m people died from it. Twenty years later that figure was a little over a quarter at 630k. The goal for 2025 is 250k. I think that’s absolutely remarkable.

    As a child in the 80s I was terrified of AIDS. It made me low-key scared of gay men because the news made it sound like I could I could get it from any one of them. And here we now are, able to provide a medication that can almost completely ensure that you will never be infected by HIV.

    Astonishing, really.

  • TacoButtPlug@sh.itjust.works
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    10 months ago

    In chemistry I was taught one carbon atom can exist in at least 12 separate living bodies before it’s no longer stable.

    • SkaveRat@discuss.tchncs.de
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      10 months ago

      that doesn’t make any sense. Carbon doesn’t get less stable by being used in bodies.

      Carbon 14 exists, but that decays regardless if it’s in a body or not. At has quite a long half life

    • Hon I think you maybe misunderstood your chem class.

      Carbon is carbon is carbon and doesn’t know or care if it’s in a living body.

      Carbon-14 has a half life of 5700 years. This means that through random decay, the approximate rate of decay is one half of a given amount every 5700 years, this of course breaks down when you reach the single-digit quantities of atoms.

      Now, this has nothing to do with the stability of an atom of regular-ass carbon-12, your common garden variety carbon, which is extremely stable and would require outside influence to decay into another isotope.

      • TacoButtPlug@sh.itjust.works
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        10 months ago

        Ahhh I misremembered. It was this “The average carbon atom in our bodies has been used by twenty other organisms before we get to it and will be used by other organisms after we die.”

        It’s been six years since that class.

    • Evil_Shrubbery@lemm.ee
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      10 months ago

      As you established that is not true, however you can add some of that carbon from some body and add it to the iron from the blood of 400 other human bodies so you can forge one nice sword.