this post was submitted on 10 Oct 2025
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[–] Jankatarch@lemmy.world 16 points 5 days ago (1 children)

Y'all don't give yourselves near enough credit for what sounds "common sense" to you.

It would look more like this.

(Click image if resolution too low)

[–] skisnow@lemmy.ca 11 points 5 days ago

The reaction in that picture is also bang-on though, because Semmelweis got a huge amount of pushback from the medical community at the time, who took offense at the apparent accusation that they were so dirty they were killing their own patients.

[–] gnu@lemmy.zip 22 points 6 days ago* (last edited 6 days ago) (2 children)

Electricity is a hard ask to even attempt to do in ancient times. Luckily there's a variety of other simpler things to establish yourself as a genius inventor - strirrups, wheelbarrows, magnetic compasses, the idea of a crank handle, and how to use triangular bracing to make a strong truss would be good options.

[–] Jankatarch@lemmy.world 3 points 5 days ago (1 children)

Washing hands before performing another surgery when you just finished patching some soldier's infectious wounds.

[–] gnu@lemmy.zip 4 points 5 days ago (1 children)

That's one with big potential but not one to lead off with, best to wait until you've 'invented' a few obvious game changers and established your philosophic credentials before attempting to introduce basic medical hygiene...

[–] CannonFodder@lemmy.world 3 points 4 days ago

Maybe invent lenses and a microscope so people could see microscopic bugs.

[–] general_kitten@sopuli.xyz 5 points 5 days ago

i would say metallurgy was advanced enough for some very simple generators using a lodestone and copper wire, that could then at least used as a heater or establish electrolysis to advance chemistry quite a bit, but applications would likely stay niche or just a curiosity, carbon arc lamps would maybe be possible but hard.

[–] Donkter@lemmy.world 28 points 6 days ago (2 children)

Yeah, you can't just lay down electricity, especially not practical electricity it requires a ton of diverse knowledge from many different studies. What I would do is give them the concept of using steam to power to spin wheels or create an engine. Then use gear ratios to show them how to scale it up. Idk if they had found neodymium magnets back then, but teach them how to use them to heat iron by spinning them on the end of a steam engine and you're starting to cook with electricity.

Again, getting to electricity from there is still a whole fucking chore. But hopefully you could rely on science to advance way faster from your advances than if you weren't there.

Actually, the most important thing you could give the greeks is the concept of the modern scientific method. That shit was invented so late and just skyrocketed science (literally) the moment it was refined.

Just write a book about everything you remember about a null hypothesis, randomized blind trials, control experiments, variable control etc. if you can squeeze any bit of statistics out of your brain, even if it's just making a graph, you probably advance the world by thousands of years.

[–] bobo1900@startrek.website 9 points 6 days ago

They definitely didn't have neodinium magnets, as neodinium being a lantanide metal was discovered only recently (1700s or 1800s) and requires extremely advanced (for the time) metallurgy and chemistry to extract from minerals.

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[–] frog@feddit.uk 23 points 6 days ago (2 children)

During a get together someone asked if you could go back in time, what one item would you take with you? My cousin said his cell phone so he could have unlimited knowledge with him. I was called an asshole for telling him it wouldn't work unless he downloaded it all on his phone and asking how would he charge it.

[–] rmuk@feddit.uk 24 points 6 days ago (3 children)

A phone would be a bit much, but an ereader with a solar charger loaded up with Wikipedia and a chunk of Project Gutenberg would probably last with a bit of care.

[–] Coopr8@kbin.earth 7 points 6 days ago (2 children)

This is a good reminder, I need to upload my Kiwix backup to my eReader. I keep a Wikipedia essentials download, survival and medical encyclopedias, and a bunch of "from the ground up" engineering resources backed up offline.

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[–] ysjet@lemmy.world 7 points 5 days ago* (last edited 5 days ago) (1 children)

No idea how well it would actually work, but having https://www.howtoinventeverything.com/ (link to the book's website, not amazon, because fuck amazon) as a reference manual would probably not be a terrible idea.

[–] Swedneck@discuss.tchncs.de 1 points 1 day ago

wikipedia without images is like 100gb, get rid of all the utterly useless things like art and sports and it's more like 40gb

[–] rmuk@feddit.uk 22 points 6 days ago (3 children)

That's a joke-turned-plot element from one of the Hitchhiker's Guide books. The protagonist, a human everyman stranded with a primitive culture on a distant world realises he has no idea how electricity, steam engines, medicine, etc works but he becomes a respected member of their community by making sandwiches.

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[–] Axolotl_cpp@feddit.it 13 points 5 days ago* (last edited 5 days ago) (13 children)

Well i actually know how to produce electricity so...wait- i don't have magnets

[–] Swedneck@discuss.tchncs.de 1 points 1 day ago

lodestone is a natural material, use that to build a shitty generator which powers a much more powerful electromagnet which you use to magnetize better permanent magnets, then use them to make better generators. bish bash bosh

[–] yermaw@sh.itjust.works 7 points 5 days ago (1 children)
[–] nialv7@lemmy.world 3 points 5 days ago (1 children)

Quantum electrodynamics, mostly.

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[–] General_Effort@lemmy.world 13 points 5 days ago

Huh. At first, I thought that was about rubbing the kitty with some amber.

"Thales of Miletus, writing at around 600 BC, noted that rubbing fur on various substances such as amber would cause them to attract specks of dust and other light objects." (Yes, that Thales.) It is still, or again, a popular demonstration, though we use plastic instead of amber. Amber in Ancient Greek is "elektron".

[–] Atomic@sh.itjust.works 11 points 5 days ago

Electricity works by moving electrons from point a to point b.

There are different ways of acomplishing this. Easiest is to have an electrolyte between zinc and copper. Kids use a potato for their science class. Volta used cloth soaked in saltwater.

Which is also why call it "Volt" and "Voltage"

[–] gandalf_der_12te@discuss.tchncs.de 3 points 4 days ago (1 children)
[–] outhouseperilous@lemmy.dbzer0.com 16 points 6 days ago (7 children)

I have very few practical skills in the modern day.

But if you need to set up a society from scratch, I can get you electricity, steel, solid agriculture, and a handful of life saving medications depending on climate.

[–] tetris11@feddit.uk 9 points 6 days ago (4 children)

wait what, that's incredible. Dibs on you when it comes to picking time travel buddies.

I offer: handy with a screwdriver and knows how to make good scary voices when telling ghost stories around a campfire.

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[–] QuinnyCoded@sh.itjust.works 13 points 6 days ago (1 children)

imagine showing them the quadratic equation and they're just like "why does this matter" and just being like "idk I barely passed"

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[–] Gorilladrums@lemmy.world 4 points 5 days ago (1 children)

I'm pretty sure there was research done that showed that people who are hypothetically transported back in time, won't be able to make any meaningful contributions to the era they go to. They will just end up integrating in that the society of that era.

Basically if you go back in time to medieval Europe, you could introduce something like paperclips to society, but you won't be able to introduce things like computers even if you know how they work and how to use them.

[–] DragonTypeWyvern@midwest.social 4 points 5 days ago* (last edited 5 days ago)

For a really easy demonstration of why, look at videos of WW2 era production machinery.

They are often amazingly, fascinatingly complex masterpieces of engineering that are still the result of generations of combined mechanical effort and discovery, and what we have now is as far above them as they are above a printing press. And building them required complex tools built by other, slightly less complex tools, you're not going right from anvil and hammer to a T-model production line.

You might be able to start the scientific revolution early and introduce key concepts but you do not know how to build even a 19th century cannery, much less a computer, and the team of engineers it would take to do it doesn't exist either.

[–] Pika@rekabu.ru 3 points 4 days ago* (last edited 4 days ago) (4 children)

Just about everyone will be successful at some things.

Everyone knows how to make:

  • Fire
  • Lever
  • Wheel
  • Clay blocks
  • Penicillium molds (antibiotics!)
  • Wine
  • Flatbread
  • Can work out a very basic steam turbine (pot+wheel)

Quite a few also know how to make:

  • Bellows and basic forgery tools
  • Various simple fabrics
  • Simple water pumps
  • Simple carts, bicycles
  • Galvanic cells, or maybe even alternating current sources (+wheel=hydro/steam power!), incandescent light bulbs
  • Cheese and regular bread
  • Beer, cider, moonshine
  • Soap

You can also teach them the basics of proper hygienic procedures to keep their food safe, their hands free of pathogens, etc.

Oh man, have you met an everyone? I might be pessimistic, but I think you might be overestimating by quite a bit. A lot of people know how those things work, but knowing enough to replicate even basics feels kinda rare. Even fire, most don't know beyond 'rub two sticks together'.

[–] ArchmageAzor@lemmy.world 3 points 4 days ago (3 children)

However, if you end up in a Christian land, you'll be seen as a heretic or sorcerer and burned at the stake before you get the chance to try any of these.

[–] Swedneck@discuss.tchncs.de 1 points 1 day ago

only if you try to spread it to the common man, offer it to the powerful people behind closed doors and they'll give you a nice box of communion wafers.

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I actually read A Connecticut Yankee in King Arthur's Court recently. It's one of those things where I knew the whole story going in because pop culture had remade it several times for both children and adults. I got Star Wars the exact same way. But I recently listened through the original on LibreVox.

Twain apparently wrote it to poke fun at a friend of his who wrote stories about noble knights errant, which is why he creates an ancient people who are perfectly ignorant and perfectly gullible, that stories of "rescuing maidens from a giant" were extremely embellished stories of buying pigs back.

Then there's the entire aspect of a modern engineer teaching a historical people new technology. Twain makes a BIG deal of "Arkansas journalism" and convincing knights to carry advertising billboards with them which would have been very modern and American to a 19th century man. But also he manages to set up a printing press in a land that doesn't understand pulp paper, a telephone network in a land that doesn't understand electricity...in apparently a couple years?

Me? I think I'm an above average candidate for this scenario, I'd die in a boiler explosion attempting to build a steam engine.

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