#dcst 4d science

[littleholmes]

“Gen, according to your mentalism, when someone really wants to believe something, are they bound to fall for a ridiculous lie? Did I get that right? Cuz I’m ten billion percent sure that’s what went down here.”

[sanderscat]

thinking about this page and how, even though his wording is very subtle, gen actually prefers the stone world to a modern one and maybe doesn't really want to go back... hmmm

maybe gen is the one to tell senku to stop his quest of saving everyone, to finally let his father go. stone world science can do impossible things, senku proved it himself, but maybe some things shouldn't be done, even if they are possible...

oh and they can have a fight too. senku would call gen selfish for not wanting to save everyone, the number of lives lost to petrification must be massive. and gen would agree; he is the most selfish person on earth after all

[shysheeperz]

[embryoblast]

G... Guh... Gu.... Gay

Reblogs > Likes

[indigosabyss]

"My name is Ishigami Senku." The voice over the transmission announced to the gaping crowd of NASA's finest, "And I'm calling from three thousand, seven hundred and forty one years in the future."

"You think he's being legit?" Someone asked.

"Sure seems like it." Another agreed, "It would explain how the transmission doesn't seem to be coming from anywhere at all."

"Say we believe you." Their chosen spokesperson said into the transceiver, "Why would you call us?"

"To stop a crisis that will lead to the death of 99.975% of the human population. Time is of the essence, so tell me: have you seen stone swallows lying around?"

----

The initial call sent the international scientific community into crisis mode.

Day in and day out, they conversed with these scientists of the future. Even ones who weren't Senku. After the initial shock of finding out that people from their age were still alive four thousand years ago, they adjusted quickly.

Of course, it wasn't all diligent work and apocalypse thwarting.

"Ha-HA!" A voice they had never heard before echoed over the Time Call, which was open almost 24/7, "So, this is our way to the past? I desire it!"

"The hell...?" Luke whispered, looking at Mandy, who shrugged wordlessly.

"Listen up, anyone who's there. I know you're taking orders from Senku and the others, so I need you to do a favor for me."

Their spokesperson hesitantly put her hand down to activate the transceiver, "Uh, okay? What's the favor?"

The boy on the other side called excitedly, becoming more ecstatic with every word, "I want you to go to the CEO of the Nanami Conglomerate. And tell him that his bastard children did what he never could, and have taken control of the entire world's capital. And it's just us two featured in the official family portraits! And then, tell him to go fuck hi-" He was cut off by someone bodily dragging him away from the mic.

"What is wrong with you?" Sai, the future's best computer programmer, yelled, barely in range of the microphone.

"Should we be listening to this?" Mandy asked.

"I desire vengeance!" The rambunctious boy insisted. There was a sound of a scuffle, and then Sai spoke again, closer to the mic and clearly addressing them.

"Sorry about that. My little brother is... a bit out there. It was probably the family ostracization."

They all clearly wanted to know more. This wasn't the first shred of juicy gossip from the future they'd gotten, but the spokesperson was nothing if not professional.

"Let's just get back to work, yeah?"

Boo.

[Part of a larger DCST time travel fic I really don't have the time to write, so I just put in the two snippets that obsessed me the most. Tell me if I should continue this into a proper fic!]

[senkusphone]

Dr. Stone chapter 2D trivia post

Spoilers ahead !

Check out too, my trivia post for the previous chapter.

This changes everything, folks! however, we gotta start from the start.

Chrome's drawn this roadmap, and he seems to pretend to build yet another of his silly storehouse towers like he's done around the globe. Next stop, the moon.

This confused me for a while until it was pointed out to me that "EMU" stands for Extravehicular Mobility unit; which is what we normally call a spacesuit (and I call and EVA suit), and notably it doesn't look muck like these simple, yet decidedly comfy and cute looking jumpsuits.

The graphic depicted below actually shows two trips, if you follow the arrows along the lines, you can see the black ones show a trip from earth orbit to the moon, and the white ones show the return trip, landing in the middle of what loosely resembles the pacific ocean, east of Japan.

In other news, Suika joins the tradition of the space elevator, an idea that has been itching in the back of people's minds since the 1890's

The more detailed explanation of this is a bit more lenghty but I'll keep it simple, so buckle up.

The idea of a space elevator is that a weight with a cable tethering to earth, could keep it tense if the weight is moving too fast (so much so that if let loose it would escape into space, or at least a higher orbit).

This cable can support a vehicle going up along it, bringing any cargo within it to space, using much less energy and resources than a rocket.

How to make a cable that can support its own weight over such a huge distance is the main reason we haven't built one.

A problem that arises from this, is that if the weight doesn't match the rotation of the earth, the cable would get pulled around (eventually breaking or winding around the earth, pulling the weight down, as cartoony as that is), so we need it to hover over one spot.

Now we gotta talk about geostationary orbit, to make this easier.

So, when something is orbiting the earth, it needs to move really fast to combat gravity in such a way that the earth curves away from the object at the same rate it's falling towards it (spaceflight really is the art of falling to the ground and missing it, as the saying goes.)

The farther out you go, the weaker gravity's pull gets, and the slower the satellite needs to be in order to find this balance. Eventually it reaches the point where, if its flying around the equator, it will, at one point, match the speed of the ground spinning beneath, this is at 35786 km above.

Such a satellite appears still in the sky, which is very handy to, as a sidenote, aim a small TV dish at it, and just leave it in place, as you may have at home.

However one must notice that in a space elevator, the satellite (our weight) is not only pulled by gravity but also by the tension in the cable.

Since it's pulled in with a greater force, it falls faster than a normal satellite, and so it needs to also travel faster to avoid falling back to earth.

As a result, it also needs to be further away than a geostat satellite, so it needs to travel a longer way around the earth, and again find the balance of speed with rotation, staying still in one spot while keeping the cable taut.

This is why the weight is shown beyond geostationary orbit here. Yes, this was a long winded explanation for just that.

And after all that, here we all are, ignoring the fact that suddenly petrified hair is flexible.

Perhaps it's like glass fiber / glass wool, and it can be flexible when it's thin enough (yes, glass fiber is just glass but thin, if you weren't aware. Incidentally, most glass fiber is made by a process that works the same as a cotton candy machine... wait this was already shown in Dr. Stone, fu-).

This however doesn't explain how this flexibility hasn't been observed in statues before. Maybe her hair is special after all.

Also special is spider silk, although sometimes overhyped by the media. Spider silk has some outstanding mechanical properties, it's very durable, and it can take a lot of tension and deformation before breaking.

Ruri here makes a reference to her previously stated occupation after the main series. A lot of people took issue with the aftermath of the characters in general, myself included. Still mad at Kohaku joining the police, I'm pretending that didn't happen.

This might be an autism 100 take, but the wheels in this cart are backwards. The flanges should be on the inside, and the taper should be towards the outside.

This geometry helps railway wheels stay on the track, go around bends, and not have to constantly abuse the flanges to not fall off the rails.

The silk road... I really am just googling basic things for you, am I? It was an ancient trade route network joining asia with the middle east and europe. Silk was one of the most famous products traded through the network.

yeesh, I've been typing this for ages (tumblr logged me out while I was writing this post and lost like half of it), and I haven't even gotten to talk about induction motors yet.

A linear motor is just an electric motor that rather than making something spin, it pulls itself along some sort of guide rail. These are in use in some trains but they are not common, the infrastructure cost is much higher than a normal railway.

Why am I talking about trains again...

One way to make it work is by induction.

The tl:dr is that when a magnetic field is moving through a conductive object, it can effectively drag it with it to an extent.

The reason this happens is called Lenz's law; the variation of the magnetic field through the metal causes an electric current to flow through it.

This current, just like an electromagnet you may have put together in science class, produces it's own magnetic field that interacts with the one coming from outside, hence making the metal react, but only when the field is moving or otherwise changing.

A big advantage is that there needs to be no contact between the source of the field and the moving metal; this is used in all sorts of electric motors even in homes, you'll find them in fans, refrigerators and washing machines, etc.

The train/motor would have a magnetic field underneath with a north-south-north-south-... pattern, which flows towards the back like a river (made by a lot of electromagnets switching in coordination).

As the magnetic river flows backwards, the induced currents in the rail produce their own magnetic field in opposition, pushing the train forward.

How viable is it to use this on a thin cable that needs to pull itself up is another story, and I have my doubts. The electronics involved would be really complex, costly and perhaps even unwieldy, but at least the conductive cable can also be used to deliver power to the elevator with some tweaks.

The structure they begin constructing for the full size elevator is named after the 1979 novel "The fountains of Paradise" by Arthur C. Clarke, in which a space elevator is also constructed.

So, we've made it to this part. As far as I've seen this one panel has been the focus of like 50% of the discussion regarding this chapter.

We all see what he's doing whether we acknowledge it or not; Inagaki should know that you cannot build a relationship on just standing close and gazing with passion; believe me I checked, multiple times.

Wouldn't mind if he hadn't procrastinated on developing Senku's side, the girl has wanted her vegetables since day two (but not day one)

And now, things get really messy, as some mind boggling events lead Ryusui to ask "why, man?"

Look, I've already added 30 images to this post, and I imagine you have seen how this chapter ends, if you haven't, buddy what the heck are you doing here. Have some emoji, I'm not gonna make a second post about this.

🥨✨🦟 ⁉️👱🏼‍♂️🏴‍☠️ 👨‍🚀☠️??

You may be confused, you should.

But after a while I came to a conclusion that I feel is pretty solid, and you may have seen it in the post from earlier.

To summarize:

Ryusui noted that things were going suspiciously well for them, and the sudden disappearance of mosquitoes in the Kanto region ticked him off to something. He sent people to search and indeed found that mosquitos have been petrified within the region, and questions whyman about it, going as far as accusing them of pretending to be Byakuya from the future.

That's where we are left.

The medusa is fully capable of faking the signal they received from "Byakuya". The receiver only detected bursts of petrification beam presumed to be from the future and decoded them as morse code, and it was noted by Balb on discord that if you trace a circle with the center near Tokyo (where the lab keeping whyman is) and a radius reaching as far as Fuji, where they received the message, the circle covers the majority of the Kanto region as stated.

The bursts of petrification would have been invisible to humans, as only the affected species can see them.

So it is assumed that the mosquitos were petrified as a means for whyman to send the fake signal all the way to Fuji, depleting its diamond battery in the process.

However I believe it's also possible the mosquitos were zapped later to make work easier for the people building the space elevator as noted by Kaseki.

Several months if not more must have passed since the Byakuya message and whyman being caught (enough for Kohaku's hair to regrow), and it would be odd that no one would have noticed the lack of mosquitos, their petrified bodies, or the effect their absense would have in the ecosystem.

So why do any or all of this?

Well we know what whyman is largely motivated by, its survival and the spread of its kind across the universe.

So I think it's trying to accelerate human progress for that purpose, so we eventually get to the point where more medusas can be made, or who knows, maybe even succeed in warning the past ones with the time machine.

I also think it's likely this misunderstanding is gonna fizzle out once some dialog is made and Senku basically says yes to that goal too.

Will we get a triple twist and find that the Byakuya message was real after all, and the mosquitos were a separate event?

Will the sengen and kohasen crowds envelop the world in thermonuclear hellfire?

And will this be the true final end of Dr. Stone? hard to tell, but the answers may come next week.

Goodnight.

[indigo-brainspark]

"Guys guys guys I know I can't cry, so what I need you to do is take me outside in the rain so that water drips onto the face you drew for me and it's going to be dramatic as fuck COME ON-"

[saber-of-dreams]

I honestly was not expecting this.

So glad we only have to wait a week for more.

Ch. 2 of 4D science here for anyone who wants a link:

Also, who looks at this and thinks "platonic"?? I don't. (Not sure I get the context though either...)

[wordswhisperinthedark]

Finally found the new Dr Stone chapter (didn't realise the series was called DCST 4D Science lol), so I'm grouping my favourite panels and pages from it — spoilers under the cut! (you can read it on Viz here!) | Pt. 2

LOOK AT HIM!!! The expression, the sheer determination!

BABIES🥺

BYAKUYA ❤️😭😭

The savagery from Medusa-chan (they ain't lying tho😂)

GEN. GEN

THIS SPREAD. GORGEOUS 😍👌

He's always so soft when he talks about his father ❤️(ಥ﹏ಥ)

THE WAY I GASPED AND TEARS WELLED UP IN MY EYES I DIDN'T EXPECT THIS AT ALL (like I was expecting they'd go back in time and save him, but I didn't expect Byakuya to be the future messenger!)

HE 👏 IS 👏 GETTING 👏 HIS 👏 FATHER 👏 BACK!!!

[olyollyoxenfree]

// Dr. Stone: 4D Science SPOILERS

Uh. Huh. We ALL want to know

[littleholmes]

I’m loving the subtle details of the progress that’s happened after all this time. Stanley’s got his uniform complete with his rank badges and such, and Ryuusui’s got a food company with a little Ryuusui on the labels as a logo

[sanderscat]

new dr. stone chapter spoilers!!!

how many times does senku have to lose his dad this is SO CRUEL💔

[stonesparrow]

I Just Read 4-D Science

spoilerz

Space elevator! Neato

CHROME AND RURI GOT MARRIED YAAAY

Ruri is such a supportive wife we love her

I’m not a Senhaku fan but they got a few panels to enjoy so congrats to them

YUZURIHA MY GIRL YUZURIHA she was only there for a little bit but she was there!!! Coming in with the silk suggestion and the silk factory I love herrrrrrr

Why-man being able to feel emotions is so tragic wow

okay here’s the thing I still don’t really vibe with the time travel stuff, like I kinda wish the theme of advancing science was more about finding alien life. That said, still a cool concept.

the ambiguous ending was…interesting. there’s definitely SOMETHING there but I doubt it’ll ever be revealed and frankly I kinda don’t want it to be.

Senku go to therapy challenge

Anyway 7/10 needed more Yuzuriha but I liked seeing everyone again

[shysheeperz]

[embryoblast]

THEY ARE SO IMPORTANT TO ME

[midorikawawas]

The end of the 4D science is a great Xmas gift and I'm completely moved by it 🥺