https://xkcd.com/2929

Alt text:

While it seemed like a fun prank at the time, I realize my prank fire extinguishers full of leaded gasoline were a mistake.

  • Wild_Mastic@lemmy.world
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    6 months ago

    So, about Project Orion from Wikipedia

    In August 1955, Ulam co-authored a classified paper proposing the use of nuclear fission bombs, “ejected and detonated at a considerable distance,” for propelling a vehicle in outer space.

    Excuse me what the fuck

    • Cethin@lemmy.zip
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      6 months ago

      All chemical propulsion is just controlled explosions that we use to push a thing forward. It’s not that different, as long as you don’t use it in the atmosphere or near humans.

  • mightyfoolish@lemmy.world
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    6 months ago

    If anyone else is also curious on why “putting mold on infections” is more good than crumple zones:

    They [molds] also play important roles in biotechnology and food science in the production of various pigments, foods, beverages, antibiotics, pharmaceuticals and enzymes. - Wikipedia

    • BearOfaTime@lemm.ee
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      6 months ago

      Transitions are game changing. Sounds like someone who doesn’t wear glasses all the time. I even had transition sunglasses before I needed glasses - got tired of taking them off going in/out all day.

      Not sure who created this (I kkow, XKCD), but it’s mediocre.

      Double-ended extension cords belongs in the top left right corner. Sounds bad and is bad.

      • Encrypt-Keeper@lemmy.world
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        6 months ago

        I’ve worn glasses my entire adult life and I had to get rid of them because being half blind every time I transition from outside to inside was interfering with my job.

      • AdrianTheFrog@lemmy.world
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        6 months ago

        Double-ended extension cords belongs in the top left right corner. Sounds bad and is bad.

        Remember, you’re probably more technical than the average person. Double ended extension chords sound fine if you haven’t heard of them before until you think about it for five seconds.

    • RenBiv@lemmy.ml
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      6 months ago

      Coming inside and not being able to see a lot.

      I specifically got rid of them having had them in my last pair. Too annoying!

        • RenBiv@lemmy.ml
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          6 months ago

          I work from home in an office garden. The walk from the house to house to the office was enough to transition the lenses and then you’re wearing sunglasses for 5 mins and they slowly change back. Definitely takes longer than 1 minute.

          • /home/pineapplelover@lemm.ee
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            6 months ago

            Interesting, yeah, I don’t mind them as much I guess. Now I’m considering just getting prescription sunglasses to wear all the time

  • yamanii@lemmy.world
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    6 months ago

    Every single glasses of mine have had transition lenses, I can’t imagine my life without them anymore.

  • hactar42@lemmy.ml
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    6 months ago

    Wouldn’t a fake prank fire extinguisher just be a normal fire extinguisher?

    • Evotech@lemmy.world
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      6 months ago

      I know right, I recently replaced my glasses with transition lenses and it’s pretty nice.

      Who doesn’t want automated sunglasses? Not seeing any downsides yet. Only thing I know they don’t work in cars, but I don’t generally drive so it’s ok

      The technology has come a long way since the 90s

      • wizardbeard@lemmy.dbzer0.com
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        6 months ago

        I find that they don’t “un-tint” when going inside fast enough for my liking, personally.

        Creates kind of the opposite effect of going from a dim room into a bright space. Instead of evrything seeming extra bright, it just dimmed everything and made it more difficult to see.

      • twice_twotimes@sh.itjust.works
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        6 months ago

        One problem my mom did not anticipate was that she would be stuck effectively wearing sunglasses for my brother’s outdoor wedding, where was sitting up with the bride and groom for the whole thing (Indian wedding). She just looked like an asshole, and continues to look like an asshole in the just about every photo of the ceremony. Oops.

  • FMT99@lemmy.world
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    6 months ago

    I was under the impression that bloodletting could in some cases actually be beneficial.

  • grrgyle@slrpnk.net
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    6 months ago

    I want transitions lenses so bad, but the women in my life won’t let me 😔

      • Spur4383@lemmy.world
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        6 months ago

        They work based on UV light. So they will not transition inside cars. They also will not transition in cold weather, so you’ll walk in snow with clear glasses and have dark ones for 5 minutes once you go inside.

        • BearOfaTime@lemm.ee
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          6 months ago

          Never had them not work in cold. They change even during heavy snowfall when it’s well below freezing and well, no sun, heavy clouds. It’s great because they help with the glare from snow.

        • Spur4383@lemmy.world
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          6 months ago

          It’s because they are not practical. They do not work inside cars, they transition super slow in winter, they are clear when you need sun glasses and dark when you need to see.

          • Takumidesh@lemmy.world
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            6 months ago

            So the scenario is A) you have transitions that work 90% of the time and a pair of prescription sunglasses for the times they don’t Or B) you have regular glasses, and still have prescription sunglasses.

            Option a means 90% of the time you don’t need to carry an additional pair of glasses with you.

            I used transition lenses for a decade, they are great.

          • BearOfaTime@lemm.ee
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            6 months ago

            They transition just fine in winter, even down to 10f or lower.

            They have a version that works in cars now. But that’s an issue with the car windshield blocking UV. So leave a magnetic “clip on” shades in the car. They look exactly like your frames, with them attached you can’t tell they just stick on from the front - they look just like your glasses.

            • Crozekiel@lemmy.zip
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              6 months ago

              Then just use the clip-ons all the time and not pay for mediocre sunglasses? I’m not a fan, I’ve tried them and hated them. Super slow to go back to clear and unreliable. I don’t want my lenses deciding when I need tinted lenses or not when I can just carry around either clip-ons or a complete second pair of prescription sunglasses. IMO Transitions are a bad solution to the problem.

              • BearOfaTime@lemm.ee
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                6 months ago

                Because I don’t have to carry the sunglasses with me all the time?

                98% of my time I’m not in a car, and my not mediocre sunglasses work better than the clipons, since I prefer the color, they already block UV and aren’t too dark.

                Why should I carry something else?

                As it is, I put my glasses on when I wake up, and most days only take them off to clean them or go to bed. They’re almost hassle free, unlike carrying around sunglasses, putting them on, taking them off, yada yada , like I did for 10 years before I got transitions.

                Why do you carry a smartphone, instead of a laptop, tablet, feature phone, GPS, mobile access point, multiple credit cards, rolodex, checkbook, etc?

                It’s funny you trying to tell me that I’m wrong to choose what works for me.

  • De_Narm@lemmy.world
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    6 months ago

    I think sliced bread is overrated as fuck. It used to be nice back when people couldn’t just buy knives for cheap, but nowadays it just means getting stale bread faster.

    • tiredofsametab@kbin.run
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      6 months ago

      For some types of bread, the machine can do it much more uniformly and without crushing. This can be difficult for humans.

    • Wizzard@lemm.ee
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      6 months ago

      Yeah, if you want to electrocute some poor linesman outside. If you have considered purchasing a generator for emergencies, get the transfer switch installed and be prepared so when you do it, you do it safely.