3 : Weapons Of Science -

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:

: Senku identifies three essential ingredients for gunpowder: sulfur, charcoal (from burnt wood), and potassium nitrate (sourced from nitric acid found in the cave). 3 : Weapons of Science

: 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 After Tsukasa reveals his murderous intent to "cull"