3 : Weapons Of Science Apr 2026

After Tsukasa reveals his murderous intent to "cull" the older generation, Senku determines that the only way to protect his friends and his goal of rebuilding civilization is through "weapons of science". Specifically, he targets the creation of as a deterrent. Key plot points include:

: Corresponds to the early chapters of the Prologue Saga in the original manga by Riichiro Inagaki and Boichi. Poprojo - Adult Swim Content Rating Archive - Dr. Stone 3 : Weapons of Science

: To buy time, Senku makes it appear as though they fled in a hurry, attempting to mislead the perceptive Tsukasa while they gather materials. Scientific Concepts Explored After Tsukasa reveals his murderous intent to "cull"

: Senku, Taiju, and Yuzuriha travel to Hakone to find a hot spring, which serves as a vital source of sulfur. Poprojo - Adult Swim Content Rating Archive - Dr

: Senku identifies three essential ingredients for gunpowder: sulfur, charcoal (from burnt wood), and potassium nitrate (sourced from nitric acid found in the cave).

is the third episode of the first season of the popular sci-fi anime Dr. Stone . In this episode, the protagonist Senku Ishigami realizes that primitive strength is not enough to stop the antagonist Shishio Tsukasa, leading him to seek more advanced technological solutions to level the playing field.

: Available on Crunchyroll and Amazon Prime Video .