<section><h2><h2><strong>The Timeline of Senku's Inventions in Dr. STONE</strong></h2></h2><p><p dir="ltr">How advanced are Senku's inventions compared to real life? Let's find out.</p></p></section><section><h2><h2><strong>Wine</strong></h2></h2><p><p dir="ltr">Wine is one of Senku’s first inventions in the show (later replaced with highly distilled alcohol), as it becomes a vital component in creating the revival fluid nital.</p></p></section><section><h3><h2><strong>The Crossbow</strong></h2></h3><p><p dir="ltr">In the show, a crossbow is among Senku’s earlier creations made to defend against Tsukasa in case he started fighting against the group since no one would be able to stop him in a pure fistfight.</p></p></section><section><h3><h2><strong>Gunpowder</strong></h2></h3><p><p dir="ltr">Senku and crew create gunpowder in Episode 4.</p></p></section><section><h3><h2><strong>Stone Knapping</strong></h2></h3><p><p dir="ltr">Senku uses stone knapping to make some of his first tools after breaking out of his petrification.</p></p></section><section><h3><h2><strong>The Pulley System</strong></h2></h3><p><p dir="ltr">Senku creates his own pulley system to save Kohaku when she’s pinned under a tree that Senku would have no hope of lifting on his own.</p></p></section><section><h3><h2><strong>Static Electricity Generator</strong></h2></h3><p><p dir="ltr">One year and four months after waking up in the Stone Age, Senku creates electricity in Episode 9. In Episode 21, he finally creates the first light bulb in the Stone World.</p></p></section><section><h3><h2><strong>Ramen</strong></h2></h3><p><p dir="ltr">Senku uses several alternate ingredient methods, such as turning foxtails into the flour equivalent to making the noodles, to make ramen with the goal of ingratiating himself to the residents of Ishigami village. Later, he uses the ramen to become friends with the villagers, as well as using the ramen as freeze-dried rations during the Stone Wars.</p></p></section><section><h3><h2><strong>Corrective Lenses</strong></h2></h3><p><p dir="ltr">Senku and the team create glasses for Suika, allowing her to see clearly for the first time in Episode 11.</p></p></section><section><h3><h2><strong>Gas Masks</strong></h2></h3><p><p dir="ltr">Senku recreates the technology to make gas masks in order to collect sulfuric acid from a lake outgassing hydrogen sulfide and sulfur dioxide.</p></p></section><section><h3><h2><strong>Sulfa Drugs</strong></h2></h3><p><p dir="ltr">After half a year of work, Senku and company are able to create the cure to Ruri’s illness with a sulphur compound-based antibiotic.</p></p></section><section><h3><h2><strong>ISS</strong></h2></h3><p><p dir="ltr">Byakuya Ishigami became an astronaut on the International Space Station before the petrification wave turned all of humanity into stone. He, along with the other five people on board, eventually returned to Earth and started Ishigami Village.</p></p></section><section><h3><h2><strong>Katana</strong></h2></h3><p><p dir="ltr">After getting ironworking running, Senku gets Ishigami Village to mass-produce katana briefly in order to intimidate an attack from the Tsukasa Empire.</p></p></section><section><h3><h2><strong>The Cotton Candy Machine</strong></h2></h3><p><p dir="ltr">Senku utilizes this technology as one of the first steps in creating the wires needed for electronics. At first, he calls on the guards Kinro and Ginro to manually pull ropes to spin the central bowl, but the resulting sugar ended up having clumps due to the uneven acceleration when the person pulling changed. Later, a series of gears replaced the ropes, leading to an even spinning speed and the stone world’s first cotton candy machine.</p></p></section><section><h3><h2><strong>The Light Bulb</strong></h2></h3><p><p dir="ltr">After various trials and advancements, Senku brings artificial light to the stone world. However, it immediately burns out. So only after further advancements, including things like vacuum tubes, he can make a fully functional light bulb usable both to light the village and in further inventions.</p></p></section><section><h3><h2><strong>The Telescope</strong></h2></h3><p><p dir="ltr">For Senku’s birthday, Ishigami Village comes together to build him an observatory, specifically including a telescope that allowed him to see Jupiter and its moons for the first time since waking up in the stone world.</p></p></section><section><h3><h2><strong>Zinc-Manganese Batteries</strong></h2></h3><p><p dir="ltr">In the show, Senku tasked Gen with making hundreds of batteries to store electric charge with the end goal of creating batteries with enough stored energy to energy to power their new phones.</p></p></section><section><h3><h2><strong>The Phonograph</strong></h2></h3><p><p dir="ltr">Byakuya Ishigami used the bottom of a glass bottle and parts from the pod that he and the other astronauts returned to Earth in to create a new record, which Senku uncovered several millennia later and began playing so that all of Ishigami Village could hear music from the old world for the first time.</p></p></section>