For me it is the fact that our blood contains iron. I earlier used to believe the word stood for some ‘organic element’ since I couldn’t accept we had metal flowing through our supposed carbon-based bodies, till I realized that is where the taste and smell of blood comes from.

  • StinkySnork@kbin.social
    link
    fedilink
    arrow-up
    152
    ·
    edit-2
    1 year ago

    A day on Venus is longer than a year on Venus. One day takes 243 Earth days, while a year takes 225.

    Maybe it’s not “well known”, but still interesting in my opinion.

    • loobkoob@kbin.social
      link
      fedilink
      arrow-up
      51
      ·
      1 year ago

      I mentioned this one to my friends the other day and it took so much convincing before they actually believed me! Definitely an interesting one. Venus also spins the opposite direction to all the other planets in the solar system, meaning the sun rises in the west and sets in the east.

    • Nonameuser678@aussie.zone
      link
      fedilink
      arrow-up
      16
      arrow-down
      1
      ·
      1 year ago

      Ok hold up so the way I’m understanding this is that its tilt (day) is slower than it’s rotation around the sun (year). Is that right or am I way off?

      • SanguinePar@lemmy.world
        link
        fedilink
        arrow-up
        10
        ·
        1 year ago

        Yep, and as a result, the ‘movement’ of the sun across the Venusian sky during a day seems to change direction (I think?)

      • Pigeon@beehaw.org
        link
        fedilink
        arrow-up
        6
        ·
        1 year ago

        You’re close. Not the tilt of its axis, but its rotation around its axis (day) is slower than its rotation around the sun (year).

        Earth’s axis is tilted at about 23 degrees, which causes the seasons. Venus, by contrast, is tilted only about 2.6 degrees, and thus basically doesn’t have seasons in a comparable way.

        Earth’s axis does very slowly wobble around (precession). Over long enough time scales, this affects the seasons, and it means the North Star has not always been aligned with Earth’s North - once, North pointed at a patch of black sky and the North Star was just another star appearing to rotate around that arbitrary point.

        I’d imagine Venus’s axis might also wobble at least somewhat, but I haven’t actually looked into this at all.


        Thinking about this sent me down a rabbit hole because the day and year lengths are so extremely close to each other, and Venus rotates around its axis clockwise (unlike the other planets) while spinning around the sun clockwise, and its tilt is so slight… so as it spins around the sun, it rotates just enough to keep one side facing the sun almost all the time. I ended up googling whether it was tidally locked, like the moon is to Earth (such that we only ever see one side and it never changes) - and apparently it would be, but its atmosphere is so wild that it prevents tidal locking. But it almost is. It kinda has a dark side, and a light side, like the moon, but there’s just enough mismatch between the yearly rotation the axial rotation that the side facing the sun changes slowly. This is the first article I found.

        From that article, it seems like the daylight hours you’d experience standing on the surface of Venus would be 117 Earth days of light, before it got dark again. So the sun would rise, and then you’d have about half a Venus year (aka about half a Venus day, too) of daylight before you’d see night again. And then it’d be night for the rest of the year. But still scorching hot because atmosphere.

        Anyway this is blowing my mind a bit. I feel like I should have known this - I used to be obsessed with astronomy when I was little. Maybe I knew it once and forgot. I don’t know. But dayum. Planets are cool.

      • Carighan Maconar@lemmy.world
        link
        fedilink
        arrow-up
        4
        ·
        1 year ago

        Yeah the Venus makes a lap around the sun in less time than it does a rotation around itself relative to said sun’s position in its sky.

    • zirzedolta@lemm.eeOP
      link
      fedilink
      arrow-up
      4
      ·
      1 year ago

      I’ve seen this fact somewhere before, but I still am unable to grasp it in my mind

      • sadbehr@lemmy.nz
        link
        fedilink
        arrow-up
        9
        ·
        1 year ago

        Short: It completes a full 360° of the sun before the planet itself does a full 360° spin.

        A few sentences longer:
        In planet Earth human terms, we have defined one day as “how long it takes the planet to do a full 360 degree rotation”. Example: You spin a basketball on your finger and it does one full rotation.

        A year to us is “how long it takes the planet to go around the sun”. Example: You hold a basketball out in front of you and you do one full rotation.

      • jon@lemdro.id
        link
        fedilink
        English
        arrow-up
        33
        ·
        edit-2
        1 year ago

        It doesn’t. Gravity is caused by mass not spin. The planet’s rotation about it’s own axis will create a centrifugal effect that offsets gravity, but the effect is negligible for anything rotating as slow as planets.

      • Turun@feddit.de
        link
        fedilink
        arrow-up
        5
        ·
        1 year ago

        The others already said the core aspect, but to get specific: the difference between your weight on the pole and your weight on the equator differs only by like .5% or something like that. This is the difference between spinning and not spinning (centrifugal force and no centrifugal force). (And also the difference in radius, since the Earth’s rotation makes it a tiny bit flatter than a perfect sphere would be)

  • starman2112@sh.itjust.works
    link
    fedilink
    arrow-up
    125
    arrow-down
    1
    ·
    edit-2
    1 year ago

    Planets and stars and galaxies are there. You can see them because they’re right over there. Like, the moon is a big fucking rock flying around the earth. Jupiter is even bigger. I see it through a telescope and think “wow that’s pretty,” but every once in a while I let it hit me that I’m looking at an unimaginably large ball of gas, and it’s, like, over there. Same as the building across the street, just a bit farther.

    The stars, too. Bit farther than Jupiter, even, but they’re right there. I can point at one and say “look at that pretty star” and right now, a long distance away, it’s just a giant ball of plasma and our sun is just another point of light in its sky. And then I think about if there’s life around those stars, and if our star captivates Albireoans the same way their star captivates me.

    And then I think about those distant galaxies, the ones we send multi-billion dollar telescopes up to space to take pictures of. It’s over there too, just a bit farther than any of the balls of plasma visible to our eyes. Do the people living in those galaxies point their telescopes at us and marvel at how distant we are? Do they point their telescopes in the opposite direction and see galaxies another universe away from us? Are there infinite distant galaxies?

    Anyway I should get back to work so I can make rent this month

    If I point my finger at one of those galaxies, there’s more gas and shit between us within a hundred miles of me than there is in the rest of the space between us combined

    • zirzedolta@lemm.eeOP
      link
      fedilink
      arrow-up
      28
      arrow-down
      5
      ·
      edit-2
      1 year ago

      What’s even more fascinating is that most of the stars we see in the sky are afterimages of primitive stars that died out long ago yet they shine as bright as the stars alive today

      • Ada@lemmy.blahaj.zone
        link
        fedilink
        English
        arrow-up
        23
        ·
        1 year ago

        That doesn’t seem right. The galaxy is only 100,000 light years across (give or take) and the life span of stars is measured in billions of years.

        Most of the stars we see are in our galaxy, so at most, we are seeing them as they were 100,000 years ago, which means that the vast majority of them will still be around, and looking much the same as they did 100,000 years ago.

          • Ada@lemmy.blahaj.zone
            link
            fedilink
            arrow-up
            11
            ·
            1 year ago

            Thinking about it further, if we’re talking about stars that we can see with telescopes, Hubble, James Webb etc, then you’re on the money. Stars in remote galaxies far outnumber the ones in our galaxy and show us glimpses of the early stages of the universe. And many of those stars are long gone

        • LostGuide@lemmy.ca
          link
          fedilink
          arrow-up
          2
          ·
          edit-2
          1 year ago

          Not too sure where you got that number from. From what I can find, the radius of the observable universe is estimated to be about 46.5 billion light-years.

          Edit: I see now that you are talking Galaxy. That’s different.

    • raptir@lemdro.id
      link
      fedilink
      English
      arrow-up
      17
      ·
      1 year ago

      I mean, you may think it’s a long way down the road to the chemist’s, but that’s just peanuts to space.

    • whileloop@lemmy.world
      link
      fedilink
      arrow-up
      14
      ·
      1 year ago

      You should try Space Engine. It’s a program to explore the universe, based on real telescope data. It also has the ability to procedurally generate galaxies, planets, and stars in unobserved parts of the universe.

    • jpeps@lemmy.world
      link
      fedilink
      arrow-up
      12
      ·
      1 year ago

      I can really relate to this. I remember a weird night in my teens where I must’ve spent at least an hour staring out of my bedroom window at the moon, because really for the first time I’d had the exact same thought. It’s right there. It’s so easy to get desensitised to that and to just think of it all as an image projected on the sky. The thought has never really left me and even now I still linger on the moon every time I see it and try to acknowledge that it is a 3 dimensional object lol.

      • EddoWagt@feddit.nl
        link
        fedilink
        arrow-up
        5
        ·
        1 year ago

        The fact that the moon is tidally locked probably doesn’t help, if it rotated it would be easier to see it as a sphere instead of an image

    • SoylentBlake@lemm.ee
      link
      fedilink
      arrow-up
      11
      ·
      1 year ago

      In the same vein, I like to remind myself that every field in physics is literally happening all around me, right now, and it always has been, in fact, I’ve never seen anything without these invisible fields in it and for some reason, that really makes me super aware of our place in the order of magnitudes.

      It’s wild we can see so much further down than up.

    • dudinax@programming.dev
      link
      fedilink
      arrow-up
      8
      ·
      1 year ago

      First time I saw Jupiter through a telescope I got hit hard by the feeling: “Oh shit, that giant monster is real”.

      • bpm@lemmy.ml
        link
        fedilink
        arrow-up
        2
        ·
        1 year ago

        “I mean, you may think it’s a long way down the road to the chemist’s, but that’s just peanuts to space.”

    • vsh@lemm.ee
      link
      fedilink
      English
      arrow-up
      3
      ·
      1 year ago

      People don’t realize how crazy it is to have a moon orbiting earth

      • HobbitFoot @thelemmy.club
        link
        fedilink
        English
        arrow-up
        3
        ·
        1 year ago

        A moon isn’t that strange, our moon is.

        First, it is massive compared to Earth. The mass of the Moon is so large that it messed with definitions of planets and plutinos.

        Second, the Moon’s size and distance from Earth is a near match for the Sun’s, which is really rare.

        And for a strange fact, the Moon is about as reflective as worn asphalt. The Moon looks white in photos of just itself, but it is a dark grey when in photos with Earth.

  • whileloop@lemmy.world
    link
    fedilink
    arrow-up
    110
    ·
    1 year ago

    There’s a giant ball of extremely hot plasma in the sky and we aren’t supposed to look at it. What is it hiding? Surely if someone managed to look at it long enough, they would see the truth!

    • zirzedolta@lemm.eeOP
      link
      fedilink
      arrow-up
      26
      ·
      1 year ago

      I often used to look at it as a child, however the adults wouldn’t let me. I knew there was some ulterior motive behind it.

    • vzq@lemmy.blahaj.zone
      link
      fedilink
      arrow-up
      20
      ·
      1 year ago

      “You look unhealthy! You should go stand in that really large room and absorb the radiation from that gigantic space-based fusion reactor more!”

      You’re right, that sounds like a great idea.

    • dudinax@programming.dev
      link
      fedilink
      arrow-up
      12
      ·
      1 year ago

      I’ve seen some of its secrets during the eclipse. It’s an angry, writhing tentacled thing. Be thankful it’s so far away.

    • visnudeva@lemmy.ml
      link
      fedilink
      arrow-up
      10
      ·
      1 year ago

      I had the same thought so I looked directly at it everyday during an hour at sunset for a year, it was intense and an interesting feeling, it is called sungazing.

    • andlewis@lemmy.world
      link
      fedilink
      arrow-up
      4
      ·
      1 year ago

      Scientists look at it. That’s where they get all their sciencing from. The forbidden knowledges comes from the sun.

  • Mothra@mander.xyz
    link
    fedilink
    arrow-up
    103
    ·
    1 year ago

    Time relativity always boggles my brain, I accept the fact but I find crazy that if I strap my twin and his atomic clock to a rocket and send them out to the stratosphere at the speed of light, when they return he’ll be younger than me and his clock will be running behind mine. Crazy

      • Bizarroland@kbin.social
        link
        fedilink
        arrow-up
        27
        arrow-down
        1
        ·
        edit-2
        1 year ago

        Also the idea that light is both a particle and a wave always messed with my head because I wanted to know why does it decide to change and when? And the answer is that light is always a particle and always a wave at the exact same time.

        It is a wave particle.

        And it is possible from light alone to build both an electron and a positron as demonstrated in a 1999 laser science experiment in New York.

        • Lvxferre@lemmy.ml
          link
          fedilink
          arrow-up
          23
          ·
          1 year ago

          I usually interpret this as behaviour: photons are not “particles” or “waves”, photons are photons. They just behave as waves and as particles, depending on how you’re looking at them.

          Note that even things with a resting mass (like you or me) are like this, too. It’s just that, as the mass increases, the wave behaviour becomes negligible.

        • NoIWontPickaName@kbin.social
          link
          fedilink
          arrow-up
          12
          ·
          1 year ago

          The crazy thing is there are actually two double slit experiments, and that light can tell whether or not you are actively observing it or not, and decides whether or not to actually exist as a wave or particle.

          • Mothra@mander.xyz
            link
            fedilink
            arrow-up
            4
            ·
            1 year ago

            I heard from someone I respect irl that these experiments were debatable, but I can’t personally hold an argument about it.

    • Lvxferre@lemmy.ml
      link
      fedilink
      arrow-up
      40
      ·
      edit-2
      1 year ago

      It’s even crazier because you don’t need to reach the speed of light. It’ll happen in a smaller degree for any speed. Even in mundane conditions.

      For example, if your twin spent four days in a 300km/h bullet train, for you it would be four days plus a second.

      Usually this difference is negligible, but for satellites (that run at rather high speeds, for a lot of time, and require precision), if you don’t take time dilation into account they misbehave.

      (For anyone wanting to mess with the maths, the formula is Δt’ = Δt / √[1 - v²/c²]. Δt = variation of time for the observer (you), Δt’ = variation of time for the moving entity (your twin), v = the moving entity’s speed, c = speed of light. Just make sure that “v” and “c” use the same units.)

      • Mothra@mander.xyz
        link
        fedilink
        arrow-up
        8
        ·
        1 year ago

        Yes I knew about that and I’m glad that doesn’t make it crazier for me, instead it makes it easier to accept. If it were something that happened only after hitting some arbitrary speed value I’d be a lot more mentally damaged

        • Lvxferre@lemmy.ml
          link
          fedilink
          arrow-up
          8
          ·
          1 year ago

          To be fair the only ones that don’t get mentally damaged at all with this stuff are theoretical physicists. After all being crazy makes you immune to further madness.

      • Dandroid@dandroid.app
        link
        fedilink
        arrow-up
        8
        ·
        1 year ago

        I wonder how long it would have taken for us to figure out time dilation in Einstein hadn’t predicted it. I wonder if it would have taken until we observed it with satellites.

        • Lvxferre@lemmy.ml
          link
          fedilink
          arrow-up
          18
          ·
          1 year ago

          Without Einstein, I think that the discovery of time dilation would be delayed by only a few years. There were a lot of people working in theoretical physics already back then; someone else would inevitably dig through Lorentz’ and Poincaré’s papers, connect the dots, and say “waitaminute time might be relative”. From that, time dilation is a consequence.

          In special I wouldn’t doubt that Max Planck would discover it.

          I’m saying that because, in both science and engineering, often you see almost concurrent discoveries or developments of the same thing, because the “spirit of a time” makes people look at that aspect of reality or that challenge and work with it. The discovery of helium and the development of aeroplanes are examples of that.

        • robinm@programming.dev
          link
          fedilink
          arrow-up
          6
          ·
          1 year ago

          IIRC the orbit of Mercure doesn’t work with Newton Model, and astronomers were predicted the discovery of Vulcain a small planet between Mercure and the Sun. So a new model had to be invented since Vulcain couldn’t be found.

        • FooBarrington@lemmy.world
          link
          fedilink
          arrow-up
          2
          ·
          1 year ago

          We would have definitely figured it out once we built GPS, since you need to account for relativistic effects there.

    • starman2112@sh.itjust.works
      link
      fedilink
      arrow-up
      12
      arrow-down
      1
      ·
      1 year ago

      Here’s something I just ran into looking stuff up for my comment: GN-z11 is one of the farthest galaxies we’ve ever seen. Thanks to the expansion of the universe, at a distance of over 30 billion light-years, it has to be moving away from us at over twice the speed of light.

      What the fuck does that mean, temporally? Like, forget the speed of light, time dilation has to do with space and relative speeds. If I’m moving at near the speed of light relative to you, then my clock will physically tick more slowly. What happens if I’m moving over twice the speed of light? Is the real life GN-z11 in our reference frame moving backwards in time at over twice the rate we’re moving forward?

      • SgtSuckaFree@lemmy.world
        link
        fedilink
        English
        arrow-up
        11
        ·
        1 year ago

        From my understanding, this is caused by the universe itself expanding between the 2 objects, not that the object itself is moving that speed relative to us. It’s still completely insane to think about, either way.

      • jon@lemdro.id
        link
        fedilink
        English
        arrow-up
        4
        ·
        1 year ago

        I can’t find any reference that says it’s moving away from us at twice the speed of light, which would violate Relativity. The fact that it is further away from us in light years than the age of the universe in years, is due to the fact that the space itself is expanding.

        • starman2112@sh.itjust.works
          link
          fedilink
          arrow-up
          5
          ·
          edit-2
          1 year ago

          The thing is, it’s moving that fast because of the expansion of space. ≈30 billion light-years over ≈14 billion years equates to over twice the speed of light. Does that mean there’s no crazy relativistic time dilation, and time is moving normally for them in our frame of reference, since they aren’t physically moving, it’s space that’s expanding? That’s just as wild to my brain

          • jon@lemdro.id
            link
            fedilink
            English
            arrow-up
            4
            ·
            1 year ago

            Relativity only applies to local reference frames and not to the recession rates of cosmologically distant objects.

    • CarbonIceDragon@pawb.social
      link
      fedilink
      arrow-up
      11
      ·
      1 year ago

      The part that I understand in the intellectual sense, because I know or at least used to know how it follows from the math, but which just doesn’t feel like it should be the case, is the whole “relativity of simultaneity” aspect of it. That there isn’t an objectively true order in which events happen in, if the events in question aren’t linked by cause and effect. That is to say, it is possible for one person to see an event A happen before another event B, a second person to see the two happen at exactly the same time, and a third to see event B happen first and then event A, and for all three of them to be equally right. It just feels like, on some level, there ought to be one objectively true order to time, a single valid timeline that all events can be placed in relative to eachother, and for time not to work that way feels so absurd as to not even be able to articulate why the idea feels wrong.

    • z500@startrek.website
      link
      fedilink
      English
      arrow-up
      9
      ·
      1 year ago

      From what I understand, you are always travelling at the speed of light through space/time, but when you move at high speeds through space that shifts the proportion of your speed out of the time dimension. And a photon travels only through space, experiencing no time between the time it was emitted and the time it was absorbed. What I just can’t wrap my head around is the concept of travelling at some speed without involving the time dimension at all.

    • Skanky@lemmy.world
      link
      fedilink
      arrow-up
      7
      ·
      1 year ago

      Probably one of the most memorable and pivotal moments in my life was when my college professor showed us the origins of relativity and how Einstein came to the conclusion that E = mc^2

      It’s a proof that only took about 10 minutes to explain, and the mathematics really aren’t that difficult to understand by most people. The geniuses in the fact that Einstein started by explaining how calculating relative motion meant that time had to be a variable that could be different depending on who the observer was. This in itself is an incredible observation, but you can take this to the extent to literally prove that mass and energy are directly related to each other. It’s absolutely wild and one of the most sublime equations ever made.

    • zirzedolta@lemm.eeOP
      link
      fedilink
      arrow-up
      2
      ·
      1 year ago

      I wish we could test this out with only simple apparatus. Unfortunately the common people do not have access to satellites or nonstop bullet trains.

  • rakyat@artemis.camp
    link
    fedilink
    arrow-up
    91
    arrow-down
    1
    ·
    edit-2
    1 year ago

    Not exactly bizarre, but it’s fun to learn that the delicious fragrance of shrimps and crabs when cooked comes from chitin, and chitin is also why sautéed mushrooms smell/taste like shrimps.

    And since fungi are mostly chitin, plants have evolved defenses against fungi by producing enzymes that destroy chitin, which is how some plants eventually evolved the ability to digest insects.

    EDIT: a previous version of this post mistakenly confused chitin with keratin (which our fingernails are made of). Thanks to sndrtj for the correction!

    • sndrtj@feddit.nl
      link
      fedilink
      arrow-up
      24
      ·
      1 year ago

      Chitin is not produced by mammals.

      Fingernails are composed primarily out of keratin (same as hair and skin).

    • Mothra@mander.xyz
      link
      fedilink
      arrow-up
      18
      ·
      1 year ago

      Wow I didn’t know this and I’ve never felt a similarity between seafood and mushrooms either in flavour or smell. But, still a cool fact.

      • Squids@sopuli.xyz
        link
        fedilink
        English
        arrow-up
        6
        arrow-down
        2
        ·
        1 year ago

        It’s one of those things that feels really obvious if you cook a lot of east/south Asian dishes - shrimp sauce and mushroom soy sauce have a pretty similar aftersmell to them because they’re so concentrated

        • Mothra@mander.xyz
          link
          fedilink
          arrow-up
          2
          arrow-down
          1
          ·
          1 year ago

          I’ll be honest, I’m not much into cooking Asian. I’m also not a frequent crustacean eater, but I eat mushrooms regularlish. I’ll pay more attention from now on, but I would have never otherwise thought of making a link between the two

    • chatokun@lemmy.dbzer0.com
      link
      fedilink
      arrow-up
      3
      ·
      1 year ago

      Huh. Oddly I am allergic to shrimp and lobster, but love mushrooms. To me they don’t smell the same though. Though this fact probably explains why veg oyster sauce is mushrooms.

  • axont [she/her, comrade/them]@hexbear.net
    link
    fedilink
    English
    arrow-up
    79
    arrow-down
    1
    ·
    1 year ago

    There are only 24 episodes of the initial run of The Jetsons and only 25 of Scooby Doo. They got aired as reruns for decades before more episodes were made. There are only 15 episodes of Mr. Bean.

  • Urist@lemmy.ml
    link
    fedilink
    English
    arrow-up
    77
    arrow-down
    3
    ·
    1 year ago

    There is about 8.1 billion people in the world. Assuming romantic cliches to be true and that we all have exactly one soulmate out there, we would have a very hard time sifting them out. If you were to use exactly one second at meeting a person it would take you 257 years to meet everyone alive on earth at this moment, which due to human life span being significantly shorter and the influx of new people makes the task essentially impossible without a spoonful of luck. Moral of the story: If you believe you have found your soul mate, be extra kind to them today.

    • Damage@feddit.it
      link
      fedilink
      arrow-up
      107
      ·
      1 year ago

      Soul mates are made, not found. You get with someone compatible to you, and through the sharing of experiences and affection, if nothing goes excessively wrong, they become unique for you.

      • d3Xt3r@lemmy.nz
        link
        fedilink
        arrow-up
        17
        arrow-down
        3
        ·
        1 year ago

        Soul mates are made, not found. You get with someone compatible to you

        That catch is, you need to find that someone in the first place, and that takes a bit of looking around. So in effect, soul mates are found.

        • troutsushi@feddit.de
          link
          fedilink
          arrow-up
          6
          ·
          1 year ago

          It gets much easier once you factor in that you, yourself, aren’t static and constant. The task isn’t to find someone capable of becoming perfect for you, it’s finding someone whose compatibility and willingness when taken into account with your own offers a fair chance to grow into a symbiotic relationship.

    • Cass.Forest@beehaw.org
      link
      fedilink
      arrow-up
      7
      ·
      1 year ago

      it would take you 257 years to meet everyone alive on earth at this moment

      Sounds like a terrible sorting algorithm /jk

    • CileTheSane@lemmy.ca
      link
      fedilink
      arrow-up
      1
      ·
      1 year ago

      If you were to use exactly one second at meeting a person it would take you 257 years to meet everyone alive on earth at this moment

      Well I don’t need to meet everybody. There’s no need to meet anyone who doesn’t match my sexual preferences, so that’s half right there. Then we can also cut everyone who’s sexual preferences I don’t meet, as well as anyone outside of a given age range (most of the people on earth are much younger than me and would be inappropriate for me to date). We can probably get that down to about 50-60 years. (At one second per person).

      • Urist@lemmy.ml
        link
        fedilink
        English
        arrow-up
        3
        ·
        1 year ago

        The thought experiment was just an attempt to show how hard it is to wrap our minds around big numbers. Even a tangible number such as the amount of people in the world.

  • CADmonkey@lemmy.world
    link
    fedilink
    arrow-up
    74
    arrow-down
    1
    ·
    1 year ago

    Speaking as someone who grew up in the 1980s…

    Micro-SD cards almost don’t make sense to me. I’m not saying I don’t believe in them, because of course I have a few of them. Obviously they exist and they work. But. They’re the size of a fingernail and can hold billions of characters of data. I uwve a camera that ive put a 128 GB microSD card in. A quick tap on the calculator tells me that’s over 91,000 3.5" floppy disks. Assuming they’re 3mm thick, that’s a stack of disks 273 meters tall. But this card is so tiny that I have to be careful not to lose it.

  • bradorsomething@ttrpg.network
    link
    fedilink
    arrow-up
    69
    ·
    1 year ago

    Let’s stick with the iron in your hemoglobin for some more weirdness. The body knows iron is hard to uptake, so when you bleed a lot under your skin and get a bruise, the body re-uptakes everything it can. Those color changes as the bruise goes away is part of the synthesis of compounds to get the good stuff back into the body, and send the rest away as waste.

    In the other direction, coronaviruses can denature the iron from your hemoglobin. So some covid patients end up with terrible oxygen levels because the virus is dumping iron product in the blood, no longer able to take in oxygen. I am a paramedic and didn’t believe this second one either, but on researching it explained to me why these patients were having so much trouble breathing on low concentration oxygen… the oxygen was there, but the transport system had lost the ability to carry it.

  • Pantherina@feddit.de
    link
    fedilink
    arrow-up
    72
    arrow-down
    4
    ·
    edit-2
    1 year ago

    That “I” am pretty much just the construct of electrons flying around my brain.

    That you need to lay down K.O. for many hours every day, otherwise you get insane.

    That we are always only 2min or so away from death, if we stopped breathing.

    That everything I eat actually gets digested into mousse and bacteria are in my body, digest it and I get the elements into my blood.

    That our world is so big, but you could also walk to China Japan from the EU, if you had enough time. But also its crazy how huge our common trade routes are.

    That a weird minicomputer in my pocket can store 128GB of information, access a wireless network from across the whole planet, and can remember so much more than my brain

  • evatronic@lemm.ee
    link
    fedilink
    English
    arrow-up
    67
    ·
    1 year ago

    The sun could’ve gone nova 8 minutes ago and we wouldn’t know for another 20 seconds or so.

    • Urist@lemmy.ml
      link
      fedilink
      English
      arrow-up
      54
      ·
      edit-2
      1 year ago

      From Wikipedia on bones:

      Bone matrix is 90 to 95% composed of elastic collagen fibers, also known as ossein,[5] and the remainder is ground substance.[6] The elasticity of collagen improves fracture resistance.[7] The matrix is hardened by the binding of inorganic mineral salt, calcium phosphate, in a chemical arrangement known as bone mineral, a form of calcium apatite.[9]

      So the statement is a bit faulty, not only because of the relative low amount of calcium in our bones, but also because it appears as a mineral. We distinguish between salts and metals because of their chemical properties being quite different (solubility, reflectiveness, electrical conductivity, maleability and so on).

      Edit: I do realize the point of the comment was not to be entirely factual, so if I am allowed as well I would say science is pretty metal.

      • Adalast@lemmy.world
        link
        fedilink
        arrow-up
        12
        ·
        1 year ago

        We also distinguish between metals and non-metals by field of study. Ask an astronomer which elements are metals sometime.

      • 018118055@sopuli.xyz
        link
        fedilink
        arrow-up
        6
        ·
        1 year ago

        Thanks for the reality injection!

        The statement was glib but even the partial truth of it made me wonder when I first learned it.

  • ryathal@sh.itjust.works
    link
    fedilink
    arrow-up
    60
    arrow-down
    2
    ·
    1 year ago

    Queuing theory can have some fun surprises.

    Suppose a small bank has only one teller. Customers take an average of 10 minutes to serve and they arrive at the rate of 5.8 per hour. With only one teller, customers will have to wait nearly five hours on average before they are served. If you add a second teller the average wait becomes 3 minutes.

      • Mothra@mander.xyz
        link
        fedilink
        arrow-up
        7
        ·
        1 year ago

        Can you tolerate it at least, or you get annoyed if it’s playing at an event/Uber/supermarket etc?

          • LanternEverywhere@kbin.social
            link
            fedilink
            arrow-up
            5
            ·
            edit-2
            1 year ago

            Wait, what? Are you saying you actively don’t like music? I mean i can (kind of) understand if a person doesn’t really get a pleasure response from listening to music, but you’re saying listening to music actually gives you a displeasure response?? ALL music? It’s ok if that’s the case, you didn’t choose to have that response, but i just want to be clear that this is what you’re saying?

            • Mothra@mander.xyz
              link
              fedilink
              arrow-up
              2
              ·
              1 year ago

              A lot of music generates unpleasant sensations for me too, though I can tolerate it a bit. Unlike the other commenter though, I can enjoy a lot of other music. What’s unusual in my opinion is that it’s all music, not the negative response. Lucky you if the worst that music can get from you is indifference!

          • Mothra@mander.xyz
            link
            fedilink
            arrow-up
            3
            ·
            1 year ago

            I see. I totally get what you mean, it’s taken me years to learn how to tolerate a lot of music I don’t like. Thanks for sharing

    • Sombyr@lemmy.one
      link
      fedilink
      arrow-up
      13
      ·
      1 year ago

      I used to be like this, but with movies. When I first met my wife, she was utterly baffled at the concept of somebody not enjoying movies, and she made it her mission to make me enjoy them.

      Come to think of it, she actually doesn’t like music much. I’ve failed to change her opinion on that though because my taste in music is shit (and I’m proud of it.)

      • Eris235 [undecided]@hexbear.net
        link
        fedilink
        English
        arrow-up
        3
        ·
        1 year ago

        I am still like this with movies and TV.

        It just doesn’t appeal to me. I’ve seen a handful of movies/shows that I’d call “not boring as shit” ever, and even then, its not something I’d choose to do myself, but is fine if I’m, like, chillin and chatting with people or whatever.

        Might be my neurodivergence, might also just be how much of a reader I am. Movies are just so slow compared to reading.

        • Sombyr@lemmy.one
          link
          fedilink
          arrow-up
          2
          ·
          1 year ago

          That’s basically how I was. Honestly, the reason I enjoy movies nowadays isn’t really because it’s my thing, but because my wife is always so excited to show me the movies she likes, and I can’t help but enjoy myself when it’s making her happy.

          I rarely watch movies on my own, or with other people besides her, but when I do, it’s usually because I think it’d be fun to tell her all about it, and maybe watch it with her too.

          I’m also bigger on reading, but I have really severe, unmedicated ADHD, so I can’t sit down with an actual book for longer than a few minutes. Gotta have pretty pictures, like a manga or graphic novel or something (and even then it’s hard.)

        • JoYo@lemmy.ml
          link
          fedilink
          English
          arrow-up
          1
          arrow-down
          1
          ·
          1 year ago

          Good movies demand attention.

          Good audio books I can listen to while I play my favorite video game.

          • Eris235 [undecided]@hexbear.net
            link
            fedilink
            English
            arrow-up
            3
            ·
            1 year ago

            I’m the opposite. I can’t ever ‘zone out’ while listening/watching/reading/playing stuff; I can’t even listen to music while playing games, and usually turn background music on low or off.

    • zirzedolta@lemm.eeOP
      link
      fedilink
      arrow-up
      10
      ·
      edit-2
      1 year ago

      As a person who was born liking music, I indeed find it too bizarre to believe to be true.

    • galloog1@lemmy.world
      link
      fedilink
      arrow-up
      5
      ·
      1 year ago

      I thought my significant other was one of these to a certain extent. It does weird things to me as a DJ. Turns out that she just likes the limited music that she likes and cannot stand most everything else.

      • JoYo@lemmy.ml
        link
        fedilink
        English
        arrow-up
        1
        arrow-down
        1
        ·
        1 year ago

        that just makes it easier to make a playlist with all their favorite songs.

    • UtiAnimi@lemmy.world
      link
      fedilink
      arrow-up
      4
      ·
      1 year ago

      For me it’s not like I don’t like music, but there are large stretches of time, where I do not care so much for it. I would guess that I haven’t actively choosen to hear music for weaks, possibly months, now. Obviously excluding the music you can’t avoid, like background music in movies and video games etc.