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Time travel (lemmy.world)
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[-] racketlauncher831@lemmy.ml 152 points 5 days ago

That time machine still works, to be fair, just at 1X.

[-] SatyrSack@quokk.au 34 points 5 days ago

Every machine is a time machine.

[-] embed_me@programming.dev 8 points 5 days ago
[-] smeenz@lemmy.nz 5 points 5 days ago

Yes.

No wait....

Ummmmm. Yes.

[-] GraniteM@lemmy.world 8 points 4 days ago* (last edited 4 days ago)

The movie Primer has a very limited time machine that works at -2X. You turn the machine on at, for instance, 2PM, and walk away, coming back in, say, eight hours. You then go into the machine, and you stay in there for eight hours. When you come out of the machine, it is now 2PM, the time when you first turned the machine on. It is a one-way machine; you can only ever use it to go backwards, and you have to go forwards in time the old-fashioned way.

It was made on a budget of $7000 and it's one of the best sci-fi movies ever made.

[-] racketlauncher831@lemmy.ml 3 points 4 days ago

Wow, thanks for the great explanation of how the movie works without spoiling it! Will check out!

[-] prole 3 points 3 days ago

I honestly do not think it's even possible to spoil that film lol.

[-] EnsignWashout@startrek.website 1 points 3 days ago

I honestly do not think it's even possible to spoil that film lol.

There are charts that try, at least.

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How hard would it be to Dr stone a 120v live outlet?

[-] Smaile@lemmy.ca 55 points 5 days ago

the dinos would get you first so very.

not if I tell them that eating us will mess with history and cause unpredictable outcomes.

[-] jaybone@lemmy.zip 33 points 5 days ago

“Will it change the path of an asteroid?”

“Well, probably not.”

Chomp

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[-] WhoIzDisIz@lemmy.today 32 points 5 days ago* (last edited 5 days ago)

About half as difficult as it would be for the 220/240V one it needs.

Yay, finally an advantage of the US electric grid.

[-] SystemDisc@feddit.org 9 points 5 days ago* (last edited 5 days ago)

That outlet is clearly a NEMA 5-15, so 110-120V

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[-] 9point6@lemmy.world 12 points 5 days ago

Assuming Dr. Stone is some kind of MacGyver regen:

Two obvious approaches to me that I'll run through in high level: build a wind/watermill generators or potato/lemon batteries

First thing you'll need to figure out for both is how to make some wire. That's going to require finding some metal ore and a hot furnace, and creating a few tools out of stone to work with it.

The biggest difficulty with the former two is going to be finding some ferrous metal to turn into magnets. You can make a magnet without electricity by smashing the shit out of some iron as it's aligned with the earth's magnetic field, and it'll become a weak magnet. From there with enough wire, you can build a generator. With the sails of the mill, you can build that out of wood and foliage.

For potato or lemon batteries, you're going to need a shitload, as they give you about a volt and a pretty tiny current, but theoretically you could figure something out that way with enough. I imagine some things may want to eat your batteries though

[-] okwhateverdude@lemmy.world 25 points 5 days ago

Dr. Stone is an anime about humanity being thrust back into the neolithic and a genius kid developing a nation of science to save the world by speedrunning the technology tree.

spoilersThey do exactly what what you mention!

https://www.imdb.com/title/tt9679542/

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[-] CannonFodder@lemmy.world 7 points 5 days ago

Your lemon batteries will be DC tho. I think step one would be to start carefully dismantling the Time Machine to see what it really needs and what parts might be unneeded and reusable in a generator.

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[-] atx_aquarian@lemmy.world 66 points 5 days ago

No problem. The same people arrive from even later in the future with enough built-in power for both machines and rescue themselves. Everyone returns to their own times. When they arrive back in the earlier time, now they know they have to build another machine with spare power to go rescue themselves.

[-] HeyThisIsntTheYMCA@lemmy.world 30 points 5 days ago

trash can. remember a trash can.

[-] dejected_warp_core@lemmy.world 26 points 5 days ago

What I love about that scene is that Bill and Ted are too dumb to know what a paradox is, and how dangerous that can be for a stable timeline. Instead, they just intuit the most useful way to abuse time travel and everything just happens to work out.

[-] VerilyFemme 17 points 5 days ago

It's the perfect culmination of how they solve all their problems: by being Bill and Ted!

I think my favorite example of this in the first film is when they unintentionally repeat So-crates' philosophy back to him by quoting Kansas.

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[-] betanumerus@lemmy.ca 41 points 5 days ago

That's exactly why the movie was called "Back the the Future": they had to find a way to get ... "back the the future".

[-] EddoWagt@feddit.nl 11 points 5 days ago

I don't know this movie called "Back the the Future"

[-] smeenz@lemmy.nz 6 points 5 days ago

Great Scott Scott

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[-] prole 2 points 3 days ago

There's a second time machine in BttF, if I recall correctly. It might be the same time machine, but in the past, I forget tbh

[-] darth_grunkus@lemmy.world 2 points 2 days ago

There are 2 time machines. The DeLorean, which gets modified to run on fusion instead of plutonium, and the time train at the very end of BttF 3.

[-] prole 1 points 1 day ago

Well... In Back to the Future 2, Marty witnesses the scene from the first movie with the Libyans. He watches himself, in the Delorean, go back in time to escape them.

At that moment in 1985, two Delorean time machines existed: the one that Marty used to return 1985, and the one that he's watching in the mall parking lot.

Technically, it's the same time machine I think?

Been years since I've watched so this is just from memory.

[-] Luisp@lemmy.dbzer0.com 31 points 5 days ago

Travel million of years into the past, you show up in the opposite side of the galaxy were the solar system used to be

[-] Atropos@lemmy.world 9 points 5 days ago

Pshaw, merely requires a minor positional adjustment, and of course the entire historical location of every planetary body in the galaxy.

[-] thebestaquaman@lemmy.world 8 points 4 days ago

Psssht. That just follows simple mechanics. Two orbiting bodies can be accurately modelled by a high schooler, how hard can a couple more be?

[-] ivanafterall@lemmy.world 6 points 5 days ago

Maybe it's back in the same spot. I'm feeling lucky.

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[-] ArmchairAce1944@discuss.online 5 points 3 days ago

This was literally a plot point and major puzzle for one of the characters in Day of The Tentacle, one of the most iconic adventure games of the 90s.

Spoilers but not spoilers. One character, Hoagie, gets taken back in time with his chrono-John (a time machine built using a port-a-potty...) To the revolutionary era USA. Hijinks ensue with the goal of charging up a battery to provide the power needed to return.

[-] brianary@lemmy.zip 38 points 5 days ago
[-] cRazi_man@europe.pub 22 points 5 days ago
[-] psx_crab@lemmy.zip 11 points 5 days ago

There's that word again, "heavy", do people in the future measure electricity by weight?

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[-] LordKitsuna@lemmy.world 21 points 5 days ago* (last edited 5 days ago)

The fact that it seems to be using a standard two prong plug outlet means it's incredibly power efficient just bring a jackery with you

[-] Napster153@lemmy.world 5 points 5 days ago

More than 90 percent of the power was used to finish dailies in Raid: Shadow Legends 4 and Clash of Clans 10

[-] EnsignWashout@startrek.website 2 points 3 days ago

That happened to my great-great-grandson. I'm not sure if he ever found his way back.

[-] PieMePlenty@lemmy.world 8 points 5 days ago* (last edited 5 days ago)

Damn, now they have to make an alternator to spec without any tools or even raw materials with the knowledge they have in their heads. Time to dig for copper I guess.. whoops no shovels either..

[-] tetris11@feddit.uk 4 points 4 days ago

Everyone knows you can chop a DC signal into AC by smushing a bear with a rock

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[-] InvalidName2@lemmy.zip 11 points 5 days ago

Reminds me of my ole lady friend Marsha Worthsby used to live up top the hills back in days when we had to share the road with stegosaurus when we walked to school uphill both ways in waist-high snow. One day we was cold and decided to go into town to see if we could warm up at Bickett's hardware store because they was one of the first places to get power where I grew up. Marsha had the bright idea to buy a heater for a nickle and take it home. One problem, they had not run power up to the top of the hill in those days. She could not use it. Bickett's let her return the thing but only gave her 4 pennies back on account it was open.

[-] jackintosh@feddit.nl 6 points 5 days ago

Very well president Biden, now let’s go back shall we?

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[-] Stefan_S_from_H@piefed.zip 8 points 5 days ago

Now it's time to search for some potatoes.

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this post was submitted on 05 Jul 2026
996 points (100.0% liked)

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