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How Is a Memory Stored Inside Your Squishy Brain?

Kurzgesagt – In a Nutshell | June 16, 2026



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Sources & further reading:
https://sites.google.com/view/sources-memory/

Memory is one of the strangest abilities you possess. Your brain uses an incredibly complex biological system to preserve moments from your past that no longer exist, allowing you to revisit experiences from years ago. But memories are not always recordings of reality. In fact, every time a memory comes under the spotlight of your attention, it can melt and change a tiny bit.

What exactly is a memory, how is a moment in time stored inside your brain, and why does remembering something slowly rewrite the story of your life?

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Written by Kurzgesagt – In a Nutshell

Comments

This post currently has 48 comments.

  1. @mateussalviano3439

    June 16, 2026 at 7:26 pm

    12 years ago I remember very clearly to be at work awaiting for tasks while browsing youtube when I got recommended "The History and Future of Everything — Time" and not long after I was really hooked in your channel.

  2. @hydrus6782

    June 16, 2026 at 7:26 pm

    "Dream, not of what you are but of what you want to be"
    Alright, now Kurzgesagt need to make a video about Warframe ! They most likely won't but hey ! I just need to alter this memory until they do (in my head) !

  3. @mohamedi.elkhuja151

    June 16, 2026 at 7:26 pm

    Would love share my gratitude to your channel, it really helped me change my life and expand my imagination and change my perspective, been a follower for many years and shared it to multiple friend and kids i teach and also their parents!!!!
    Keep up the enlightenment and good work Kurz! ❤❤

  4. @ImpulsiveBloop

    June 16, 2026 at 7:26 pm

    My brain is weird. I don't remember episodically. There are a few snapshots, but that's about it.

    My main memory works on emotional association towards specific sensory inputs. No memory gets attached to the association, it just forms one day and sticks.

    I've also found that while I struggle to remember specific events and facts from memory, I can retain facts so long as I put logical reasoning behind it. That is to say, instead of remembering the fact itself, I teach myself how to conclude the fact based on reasoning.

  5. @dobbi6083

    June 16, 2026 at 7:26 pm

    Not sure if it's the reason, but during a good chunk of my studies at university i had just 4-5h sleep a night during week days. My whole memory feels like it's foggy. So many events that i know where and when they happened and yet it feels like i wasn't there, cause i can't really remember going through them

  6. @CaptainMisery86

    June 16, 2026 at 7:26 pm

    The thing I hate most about the brain is that it is constantly doing some of the most complicated physics problems, but if you put the most basic physics problem in front of me, it looks like gibberish and is basically impossible to solve

  7. @sirping

    June 16, 2026 at 7:26 pm

    Very great video. I was just studying this for an exam and it took me a long time to get a grip of it. Watching this video literally strengthened my Assembly about this. We need some neurobiology merch!

  8. @MrJeffTTV

    June 16, 2026 at 7:26 pm

    Intristigly mdma had me have such a drastic character shift that it scared me, memories from before that are so far away as if they didn't happen to me but it's a story I heard. Also lsd was Intresting as it was not inducing this drastic memory adjustment (at least that's how I remember it). Just sharing, all be hrla carefully with drugs

  9. @Cyan42352

    June 16, 2026 at 7:26 pm

    I find this subject very interesting, because my experience of memories is very different. Granted this is primarily my personal account, but I've verified it at numerous points throughout life. While parts of my memory are hazy, not quite clear, and may be missing visual details. The core information tends to always be intact, and I'm not talking about the things involved in it, but also the details. I can recall things quite accurately even if I can't recall the visual information accurately. As a result I can remember data extremely well, and even recall what even I would consider an insignificant memory. I remember the names and curriculum of every teacher I've ever met even when I don't remember their faces exactly, though some I do remember and they are certainly stronger than others. I've recalled information that most people forget a week later, even if it was just in passing and held very little importance. In a way it's kind of a burden because I can remember things so accurately that it sometimes gets in the way of learning new things, almost like a habit that won't go away, despite never actually forming a habit around it. I guess a way of putting it, is that I formed a habit of accurately recalling things or something to that end.

  10. @catcatcatcatcatcatcatcatcatca

    June 16, 2026 at 7:26 pm

    My brain can come up with examples of arbitary things much more complex than itself. I tried and failed to define a temporaly bounded criteria for meaningfulness such that my own brain could by definition be the most complex meaningful thing within such bounds, but I failed to find a definition where my brains own encoding and processing of information could by definition be greater than information stored outside my brain (ie: written down or made available later).

    Which is weird, right? Surely memories are in some sense superior to tool-based recall? Except that both take time, and processing of memories itself takes time. A less complex process that would have the same outcome would do just as well.

    From that argument, I suppose the complexity of human brain in itself is not meaningful. And because more complex, meaningless things exist, the intuitively correct sounding argument that at least from our perspective our own brain is the most complex thing in the universe doesn’t seem to hold. We don’t actually profit from that complexity, it just happens to be necessary for our brains to function as they do. If a less complex thing could plausibly do as well, why should one place any value in the complexity itself?

  11. @JoshTigerheart

    June 16, 2026 at 7:26 pm

    One thing I wish the video covered was how the long term storage worked more. Like, on rare occasion, I can be minding my own business and then suddenly experience a memory of a thing I have literally not remembered or thought about in a decade or longer, like some arbitrary event or experience from when I was a kid.

  12. @1Animeculture

    June 16, 2026 at 7:26 pm

    Meditations loosens those connections to "help" them reshape and reform 🙂 When ya old, new connections are more difficult to form, meditation can "force" em to loosen so that you can, indeed, teach an old dog new tricks 😉

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