Dr. Stone Wiki
Dr. Stone Wiki

Why-Man (WHYMAN (ホワイマン) Howaiman) is the two hundred and twenty-ninth chapter of the Dr. Stone manga.


The petrification devices known as Why-man explain why they petrified all the humans on Earth. They begin by saying they find planets with regular electromagnetic waves, indicating intelligent life. Next, they chose a random species, in this case the swallows, to petrify in order to see which beings react to this change and start discussing the phenomenon over the electromagnetic waves. They established that this was humanity.

The next step was to petrify humanity, in order to filter through the individuals most likely to help the devices survive: ones that were thinkers, that could see the allure of eternal life. Despite the global petrification, those on the ISS survived and created a new society on Treasure Island.

3,000 years later, the devices began picking up new radio signals from Earth, made by the people of the Petrification Kingdom polishing stones and having the sparks amplified by their outfits. Having established that there were survivors, the devices put their next step into action: showing the humans how to use the petrification devices.

Several of the devices dropped to Earth over Treasure Island, and soon enough someone picked one up, and was told of the command. Fights broke out, and Matsukaze and his master destroyed all but one device. Because of the result, the devices began to have doubts over whether humanity was the correct species to parasitize. As they were, humans didn't have the technology or skills required to cultivate them.

The devices thought they had the wrong species, until one day Senku turned on the high-powered radio tower, proving that humanity was in fact capable, but was uninterested in the eternal life the devices had to offer, thus their repeating message of "why?".

Characters in Order of Appearance[]

Chapter Notes[]

  • Why-man reveals the truth of the global petrification 3,700 years prior, from the beginning until their first contact with Senku.
    • They found humanity based on the regular electromagnetic signals coming from the planet.
    • The swallows were petrified to see which species on Earth was the intelligent one.
    • Treasure Island was given the devices in the hopes that they'd understand the gift and begin cultivating the petrification devices.
    • The devices grew annoyed that humanity appeared to have the skills to fix them, but showed no interest in doing so, which prompted the "why".
  • The warring events on Treasure Island during Matsukaze's time occurred ~700 years prior to his de-petrification.
  • The devices shot themselves in the metaphorical foot; not getting that petrifying the entire planet would negate the very deal they wanted.

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Volume 1 1234567Extras
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Volume 27 Terraforming4D Science: 14D Science: 24D Science: 3
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Story Arcs
Prologue Saga
Stone Formula Arc
Chapters 1234
Episodes 12
Vs. Tsukasa Arc
Chapters 56789101112
Episodes 345
Ishigami Village Saga
Kingdom of Science Arc
Chapters 131415161718192021222324252627282930313233
Episodes 5678910111213
Village Games Arc
Chapters 34353637383940
Episodes 131415
Village Origins Arc
Chapters 4142434445
Episodes 1617
Stone Wars Saga
Vs. Hyoga Arc
Chapters 4647484950
Episodes 1819
Communications Arc
Chapters 5152535455565758596061626364656667686970717273747576777879808182
Episodes 20212223242526272829303132333435
Source of the Petrification Saga
Age of Exploration Arc
Chapters 8384858687888990919293949596979899 100
Episodes 35Ryusui3637383940
Treasure Island Arc
Chapters 101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138
Episodes 4142434445464748495051525354
The Truth of the Petrification Saga
New America City Arc
Chapters 139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169
Episodes 555657
South America Arc
Chapters 170171172173174175176177178179180181182183184185186187188189190191192193
New Stone World Arc
Chapters 194195196197198199200
Globetrotting Arc
Chapters 201202203204205206207208209210211212
Stone to Space Saga
Moon Mission Arc
Chapters 213214215216217218219220221222223224225226227228229230231232