Chapter 40

**Two Million Years in the Making** (２００万 (まん) 年 (ねん) の結 (けっ) 晶 (しょう) , *Nihyakuman-nen no Kesshō*) is the fortieth chapter of the *Dr. Stone* manga.

## Summary

The announcer declares Senku as the winner (and new chief), much to Kokuyo’s, the Kingdom Of Science’s and the villagers’ shock. Senku takes Ruri’s hand in marriage which causes Kokuyo to yell at him with anger. The villages become undecided and confused on who to side with, as Senku had won under the ”watchful eye of God.”

Senku asks for some alcohol, which is brought over by Sagan and his son Ganen. Some of the liquor has now turned to vinegar, which Senku asks to have anyway. As this is happening, Ruri starts to cough violently, spraying blood into her covering hands. Senku notes that she doesn't have much time left to spare, and decides that they must immediately start working on the antibiotics. Unmo is ready to indulge in drinking as Turquoise criticizes him. As senku is about to leave, Genbu informs him the wedding ceremony involves drinking through the night. In response to this, Senku decides he’ll need a divorce, once again leaving everyone in shock. He swiftly and happily leaves the location, dragging along his expert craftsman and Kohaku following with several large clay pots containing liquor and vinegar. The astonished villagers and Ruri observe this happen, as they departed Ruri observes that by the looks of things, she's become the first ever divorced priestess.

Kokuyo goes crazy with rage, but Kinro interrupts him with an explanation of what Senku's intentions are.

By a small waterfall, Kaseki builds a strange bamboo machine that spins in the water. When asked what it’s for, Senku replies they’ll find out tomorrow and tells Kaseki to keep watch. Kaseki forces Gen to help him - much to Gen’s protest. After forcefully waking Chrome up with some Ammonia, he informs the team the drugs will be ready by tomorrow. The final preparation of the antibiotic begins.

To begin, Senku asks for Coal, but as suspected, they burned through Chrome's entire stash while making iron. Still, what they were after was the left over tar, which Senku collected from the chimney from the iron smelting furnace. This tar was washed with hydrochloric acid and mixed with vinegar, producing Aniline.

Senku reveals they have roughly another 25 steps to go, to Chrome‘s shock. They begin collecting materials. Kohaku was sent to dive for a sea sponge for filtration, and Suika can be seen pouring water on the condenser of a distilling apparatus. Senku and Chrome worked at the lab, until it was shaken by an explosion. A curious Gen examines the Bamboo contraption the day after, and discovers the device has made carbonated water within it. He rushes back to the lab, overjoyed by his belief that Senku is preparing a Cola drink for him. He finds the lab wrecked, Senku sitting on the floor and Chrome laying face down under the table. Senku gives an overly long explanation of the events leading to the explosion and what to do after, leaving Gen even more confused Then reveals that they are going to use the carbonic acid in the water, mix it with Sodium Hydroxide in order to make baking soda. By mixing the rest of the chemicals in baking soda, they compete the final step and finally finish the Cure-all.

Joyfully, the team celebrates their victory and look back on the last half a year. Gen explains he can’t enter the village to see Ruri be cured so decides to stay at the lab. As the others walk off, Suika feels bad for Gen after all he’d done for them. Gen miserably walks back to the lab - only to realize that Senku had secretly been making the Cola he‘d promised all this time. Over at the village, Senku gets ready to feed Ruri the Cure-all.

## Characters In Order Of Appearance

* Kokuyo
* Senku Ishigami
* Ruri
* Kohaku
* Kaseki
* Chrome
* Gen Asagiri
* Suika

## Chapter Notes

* Senku marries Ruri.
	+ Turquoise and Kokuyo aren't happy because he's an outsider, but there's nothing they can do about it by their own rules.
* Senku demands all their booze.
* Senku divorces Ruri to get out of the celebration.
* Senku begins making the sulfa drug to save Ruri.
* Kaseki builds a device to make carbonated water.
* Senku completes the sulfa drug with everyone's help.
* Gen gets his cola.

## Trivia

* Ammonia is a type of smelling salt, that has an extremely strong scent.