• ultranaut@lemmy.world
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    12 hours ago

    If you get bit by a venomous snake sucking the venom out doesn’t work and is likely to make things worse.

    • StinkyFingerItchyBum@lemmy.ca
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      2 days ago

      Boiling water renders it biologically safe. No giardiosis, etc…

      If you are drinking water with significant heavy metals, concentrating by evaporating a few cups when boiling a gallon, isn’t your problem.

    • jeffw@lemmy.world
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      3 days ago

      Just drink the lakewater, don’t worry that everyone else died of food poisoning!

    • duckythescientist@sh.itjust.works
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      2 days ago

      You’re not even concentrating it that much when you boil it. Keep the lid on the pot next time so you lose less to steam and evaporation.

      • floquant@lemmy.dbzer0.com
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        2 days ago

        Also, “concentrating it” makes it sound like you’re making it worse, but the total amount (mass/moles) stays the same.

        Plus if you build a simple condensation setup, boil the whole thing and drink the condensed steam, you’re also getting rid of 99%* of those heavy, inorganic impurities

        *out-of-my-ass number

      • Fondots@lemmy.world
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        2 days ago

        Distilling is different from just boiling, in the sort of context we’'re talking about you’re just getting water up to boiling in a container to kill pathogens, not collecting the steam that evaporates off of it to condense back into water to drink.

        And in a lot of survival situations you’d be lucky to have something to boil water with, let alone construct a still.

        To their credit, yes, theoretically boiling water will concentrate things like heavy metals. You’re just not going to be able to get it hot enough to evaporate stuff like lead or mercury, all of the water will boil off and your pot will melt long before that if you can even reach the sorts of temperatures needed (you probably wouldn’t be able to, at least not without constructing some additional infrastructure, and if you’re capable of that odds are you’re pretty much set for this kind of situation and not need to be reading anything in this thread for advice)

        In practice, you’re just not going to be boiling water hot or long enough for that to really matter. You really only need to get it up to boiling for an instant then you can take it off the heat (and arguably it’s probably safe at some point before it reaches boiling, but unless you have a thermometer, stopwatch, and some tables to consult about pasteurization, it’s a lot easier to just watch for a boil.) Go put a few cups of water in a pot on the stove and get it up to boiling, how much did the water level change? Probably not all that much, you’re not doing much to concentrate whatever’s in there.

        You have maybe a week you can go without water under absolutely ideal conditions, more realistically you probably have about 3-5 days, or even a few hours if it’s hot and you’re exerting yourself. Most toxins you’re going to find in water aren’t going to kill you in that sort of time frame, they’re more likely to be something that will add to your lifetime exposure and bioaccumulation and cause issues for you sometime down the road, maybe years or decades later.

        And if the concentration of whatever you’re concerned about is high enough to cause more immediate issues, odds are that you’re kind of fucked either way, and the tiny bit of concentration that happens from boiling isn’t going to be a major factor. You’d probably get sick regardless, you’re just trading one issue for another- dying of dehydration in a couple days, or dying of poison in a couple days.

        And some more volatile chemicals might evaporate off in the boiling process, let’s say that for some reason there’s a bunch of acetone in the water (picked that for no other reason than because I happen to be looking at a can of it on a shelf in my basement while I’m writing this) acetone boils at 132.8°f (56c) so by the time the water reaches boiling all or most of that acetone has already evaporated.

    • bstix@feddit.dk
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      2 days ago

      I’d like to read a survival guide based on actual locations rather than old boy scout tricks.

      If you strand on a deserted island in the year 2026 you will find a heap of plastic bottles and other trash that can be made into a solar powered distillery or desalination device. It might still be full of micro plastics but whatever so is the the bottled water in the grocery store.

      Actually if you ever get in a survival situation besides falling off a ship, your best option is probably to rob the nearest grocery store. It’s a great resource that can be found in the most desolate places.

      • sydd@lemmy.world
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        2 days ago

        If you have an entire grocery store to rob what kind of survival situation are you in? Zombies?

        • bstix@feddit.dk
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          2 days ago

          Day to day survival in a lage stage capitalism.

          I’d choose the zombie apocalypse and catastrophic events any day. At least that doesn’t have the existential dread looming over your every move.

  • 667@lemmy.radio
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    2 days ago

    The brightest star in the sky is not the North Star (Polaris). If you follow the brightest star in the sky you will follow a planet and travel some curved path.

    How to really find Polaris:

      • fartographer@lemmy.world
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        2 days ago

        I always struggled with that, too, until my cousin taught me to use Cassiopeia. The other constellations use way too complex of shapes and require accuracy, and they’re not super-bright.

        Cassiopeia looks like a W or M. Look for 5 dots that could possibly form an ugly W where the left side is wider and more shallow than the right. It’ll genuinely stand out like this.

        Cassiopeia

        There it is!

        Cassiopeia identified

        Now, mentally draw a straight line across the tips of the shallow side of the W. Then, draw a straight line through that starting from the bottom of the shallow side. You’ll get something like an arrow shape. Keep following that perpendicular line away from the W until you find something nearby the line that is noticeably bright. That’s Polaris!

        Cassiopeia markup

        After you find that, you can confirm you found the right star by looking for the dippers and shit.

        • Psythik@lemmy.world
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          23 hours ago

          Meh, looking for the dippers always worked for me. You put a lot of thought into this.

      • 667@lemmy.radio
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        2 days ago

        Great question! Use https://stellarium-web.org/ and set it for your latitude or location, according to your preference, and then look toward the northern sky. You can set the app to highlight the constellations.

      • starman2112@sh.itjust.works
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        2 days ago

        Live somewhere dark enough and gain pattern recognition

        Edit: This was kind of unhelpful, so I’ll also recommend Stellarium. The Big Dipper is comprised of very bright stars, and is visible in the northern hemisphere year-round, so it’s a good first constellation to learn. Once you get used to how it looks both on stellarium and in the night sky, you’ll be better equipped to extrapolate how other constellations should look in the night sky, given how they look on stellarium. Once you start building those neural pathways, it gets a lot easier.

        I realize this is basically just “git gud” but for astronomy, but it really is a matter of experience, not skill

    • Ibisalt@lemmy.world
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      19 hours ago

      I mean besides Venus, Polaris is not even the brightest real star. (Its Sirius)

  • Ludicrous0251@piefed.zip
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    2 days ago

    Is you’re lost but someone knows where you’re supposed to be it’s probably better to stay put.

    Also moss can grow on any side of a tree.

  • Ibisalt@lemmy.world
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    10 hours ago

    When caught in a Thunderstorm: Never lie flat on the ground. Crouch down in a ball-like position with your head tucked and hands over your ears so that you are down low with minimal contact with the ground. The discharge ends in the ground, and a person lying flat is at great risk of being caught in the discharge channel.

    source:https://seecheck.org/index.php/2025/08/17/no-you-shouldnt-lie-on-the-ground-during-a-thunderstorm/

    https://www.iii.org/article/lightning-safety-10-myths-and-the-facts

  • 🌞 Alexander Daychilde 🌞@lemmy.world
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    19 hours ago

    If you are at home when the threat of a tornado happens, go to the basement or the most inside room (most walls between you and outside).

    But my main reason for posting: IF you are out and encounter a tornado, if you are far enough away to avoid it, avoid it, but if it’s close or if it doesn’t appear to be moving (meaning it’s moving straight for you), then you need to seek a ditch or low ground. A ditch is best - being even slightly below the level of the ground around you GREATLY reduces the wind and debris, which is what will kill you. Something like a culvert can be good, although not so small that a piece of debris could trap you in rising water… but a tornado is typically gone quickly relative to flash flooding.

    The myth is that stopping under a bridge is good - even “better” is climbing the slope to hidde under the girders of the bridge. Sometimes you might survive, but people have died - packed in with mud and debris blow by the tornado. This also elevates you more into the windfield, which is bad.

    Ideally you don’t want to be close to cars, much less inside them.

      • jeffw@lemmy.world
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        3 days ago

        Sadly, I think some people believe it.

        But other people think you get sick from being outside in the cold

      • blarghly@lemmy.world
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        2 days ago

        I mean, it definitely makes you warmer. In that it shunts your blood to the outer layer of your body, warming your skin and making you feel less cold. Problem is, this actually makes you lose heat more rapidly, and increases your susceptibility to hypothermia. But since you can experience “drink alcohol, feel warmer” yourself, the myth will probably persist indefinitely.

      • kn33@lemmy.world
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        3 days ago

        I don’t know how much so practically, but it perseveres at least in tongue in cheek references to “putting on your whiskey jacket”

      • Chozo@fedia.io
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        2 days ago

        Yes. It’s where the old meme of St Bernards carrying little flasks of alcohol came from. The idea was if you were injured in the cold, alcohol would warm you up.

        You may feel warmer. But it actually lowers your core temp, IIRC.

  • Luc@lemmy.world
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    1 day ago

    TL;DR: If you post here, please emphasise the true text, e.g. put that up front!

    I’ve noticed that I don’t remember text literally, so if a post says “the sky isn’t green” then I might tomorrow remember having read something about the sky and green but was this the correction or was this the myth? Was it even in the myths thread or did I read it elsewhere?

    Better for me to read only true things, e.g.: “the sky is blue, don’t believe the myth about a different color”. Or mention the myth is in a spoiler tag or elsewhere in the text where it doesn’t act like the headline or main takeaway

    Apparently most people have this, see e.g.: https://online.ucpress.edu/collabra/article/6/1/38/114468/Repetition-Increases-Perceived-Truth-Even-for

    • cmbabul@lemmy.world
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      2 days ago

      No you got it backwards, you look for a cop and then go the other way before they see you

      • unmagical@lemmy.ml
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        2 days ago

        Hence why I posted it as an answer to the inquiry “What survival myth is completely wrong and can get you killed?”

        • cmbabul@lemmy.world
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          2 days ago

          Sorry I was trying to make a “it’s not technically wrong” style joke because fundamentally you’d still be looking for a cop but since cops are not actually safe the second part is the wrong part

          Attempt was to add to your joke but didn’t land. Been a long few weeks

    • Obinice@lemmy.world
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      2 days ago

      You’d never find one of you went looking over here, I’ve not seen a cop on foot or parked up in YEARS. Only ever see em driving somewhere. Strange.

      When I spent some time in the USA though it was creepy, they’d drive their cars around real slow, just watching you, and they’re everywhere. It felt weirdly oppressive/threatening to have them always around the next corner, always over your shoulder…watching o.O