<p>Supposedly, as far as I know, the petrification device works by telling it the distance of  petrification. If you say 1 meter, 1 second, it will petrify in 1 second in a radius of 1 meter. But the person who wanted to petrify the whole Earth said the diameter of Earth as distance. But if he wanted to cover the whole Earth, he should have mentioned the perimeter of Earth divided by 2, not the diameter of Earth. The diameter of Earth is smaller than the perimeter of Earth divided by 2, so you wouldnt petrify the whole Earth by saying the diameter.</p>
<p>Being Dr Stone a very &quot;scientific&quot; anime, &quot;the most scientific anime ever&quot;, with a lot of Physics, Mathematics and Chemistry details and teachings, I wonder how can this be wrong, or I am missinterpreting something?</p>
<p>Why did the person who wanted to petrify the whole world say the diameter of Earth?</p>

CC BY-SA 4.0
2023-12-08T07:45:15.063Z
Is there any reason to suggest that the petrification device is bound by Earth's surface? If the ground does not shield from its radiation, then the diameter of Earth is enough. If it does, then you can hardly hope to do it in one fell swoop. The only option I can see that makes the diameter not work and the equatiorial semicircumference yes would be as if the radiation operated like some sort of liquid that goes straight through air (and water?), but which is also bound to flow over solid ground.
Gae. S.
CC BY-SA 4.0
2023-12-08T15:32:25.363Z
@Gae.S. interesting point . Yet, people in the space station wasnt petrified during Earth's petrification.
Pablo
CC BY-SA 4.0
2023-12-08T15:39:14.603Z
BTW, usually kilometers of rock stop most radiation. But there are exceptions like "Neutrinos present a very high flux of particles so very intense radiation but luckily these particles interact so weakly with matter that they pass even through the Earth without interacting". Anyway, if the Space Station radiation shield can stop the petrification ray, the kilometers of rock from Earth sure also can stop it
Pablo
CC BY-SA 4.0
2023-12-08T20:30:12.063Z
I know absolutely nothing about Dr. STONE, but if the petrification device is located on the Earth's surface, then the space station could easily have escaped just by being on the other side of the planet.
今撫子
CC BY-SA 4.0
2023-12-08T20:38:40.273Z
@鬼いちゃん so you mean, because the space station would be at a distance of diameter+408 kms, it should have escaped, right? or did it get it wrong? But that would be the same for an airplane flying at diameter+10kms , wouldnt be?
Pablo
CC BY-SA 4.0
2023-12-08T20:43:28.327Z
Bingo. Except the Earth also isn't a perfect sphere, and it could be the case that there simply happened not to be a plane in a region where cruising altitude would escape at the time.
今撫子
CC BY-SA 4.0
2023-12-08T20:45:09.317Z
@鬼いちゃん It could be an answer, but it doesnt seem very likely. There are around 100,000 flights per day in the world
Pablo
CC BY-SA 4.0
2023-12-16T03:43:52.660Z
Also how did only effect humans because it is shown effective against birds(I think they are swallows) .
Ch.Siva Ram Kishore
<dr.stone>
Why did the person who wanted to petrify the whole world say the diameter of Earth?
# Why did the person who wanted to petrify the whole world say the diameter of Earth?
Posted by: username_0 on 2023-12-07
Supposedly, as far as I know, the petrification device works by telling it the distance of petrification. If you say 1 meter, 1 second, it will petrify in 1 second in a radius of 1 meter. But the person who wanted to petrify the whole Earth said the diameter of Earth as distance. But if he wanted to cover the whole Earth, he should have mentioned the perimeter of Earth divided by 2, not the diameter of Earth. The diameter of Earth is smaller than the perimeter of Earth divided by 2, so you wouldnt petrify the whole Earth by saying the diameter.

Being Dr Stone a very "scientific" anime, "the most scientific anime ever", with a lot of Physics, Mathematics and Chemistry details and teachings, I wonder how can this be wrong, or I am missinterpreting something?

Why did the person who wanted to petrify the whole world say the diameter of Earth?
**Tags:** dr.stone
> **Comments:**
> **username_1**: Is there any reason to suggest that the petrification device is bound by Earth's surface? If the ground does not shield from its radiation, then the diameter of Earth is enough. If it does, then you can hardly hope to do it in one fell swoop. The only option I can see that makes the diameter not work and the equatiorial semicircumference yes would be as if the radiation operated like some sort of liquid that goes straight through air (and water?), but which is also bound to flow over solid ground.  
> **username_0**: @Gae.S. interesting point . Yet, people in the space station wasnt petrified during Earth's petrification.  
> **username_0**: BTW, usually kilometers of rock stop most radiation. But there are exceptions like "Neutrinos present a very high flux of particles so very intense radiation but luckily these particles interact so weakly with matter that they pass even through the Earth without interacting". Anyway, if the Space Station radiation shield can stop the petrification ray, the kilometers of rock from Earth sure also can stop it  
> **username_2**: I know absolutely nothing about Dr. STONE, but if the petrification device is located on the Earth's surface, then the space station could easily have escaped just by being on the other side of the planet.  
> **username_0**: @鬼いちゃん so you mean, because the space station would be at a distance of diameter+408 kms, it should have escaped, right? or did it get it wrong? But that would be the same for an airplane flying at diameter+10kms , wouldnt be?  
> **username_2**: Bingo. Except the Earth also isn't a perfect sphere, and it could be the case that there simply happened not to be a plane in a region where cruising altitude would escape at the time.  
> **username_0**: @鬼いちゃん It could be an answer, but it doesnt seem very likely. There are around 100,000 flights per day in the world  
> **username_3**: Also how did only effect humans because it is shown effective against birds(I think they are swallows) .  
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