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Scientist, All Alone (ひとりぼっちのサイエンティスト Hitoribocchi no Saientisuto) is the one hundred and ninety-sixth chapter of the Dr. Stone manga.


The chapter begins with Suika determined to revive everyone, writing "e=mc2" in blood onto her poncho. She checks the instructions left behind for methods of recreating the Revival Fluid. She decides to try options 1 and 2 as they are faster processes, leaving 3 in Senku's clothing where she found it.

She the processes she attempts are the Ostwald process and the electrical arc process, neither of which succeed. The science is simply too difficult to attempt with the resources at hand by someone not very experienced. She remembers she has the third option: using feces. Collecting it from various sources, Suika buries it with ashes, following the instructions.

Years later after Suika began making nitric acid, Suika successfully revives Senku who was counting 236,109,753 seconds, over 7 years after everyone got petrified. Suika seems to have grown up a little in that time. Suika apologizes to Senku for taking too long to revive him, but he instead congratulates and praises her for taking such a short time, considering the circumstances. Overjoyed, Suika embraces Senku, happy at the reunion.

Characters in Order of Appearance[]

Chapter Notes[]

  • Suika attempts to make nitric acid using Senku's notes.
    • The first two methods fail.
    • The third method Suika implements is a modified version of Albert Nodon's method, also sometimes referred as the french method. This method uses decomposing bacteria to convert calcium carbonate into calcium nitrate. Nodon converted this substance into nitric acid by means of electrolysis; while Suika did so by reacting the nitrate with sulfuric acid and then distilling off the nitric acid.
  • Suika has grown older and is roughly twice the height she originally was.
  • Senku awakens and reveals that it has been 7 years since the second petrification.


  • Suika copies the formula on Senku's cloak onto her poncho, a callback to Senku in Chapter 14.
  • Senku is wearing a modified version of his outfit, implying Suika stitched together new patches as the cloak got worn down over the years.

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