#it's important to remember that science doesn't exist in a vacuum

[drstonetrivia]

Chapter 203 Trivia

Happy 4th of July from Dr. Xeno*!

(*Indirectly.)

Fluorite mines still exist in Japan, however they're far inland so the KoS can't make use of their boat routes for transport.

Fluorite is one of the first materials shown to fluoresce (=glow when light/EM radiation hits it), which is what the phenomenon was named after!

One of the major problems in improving telescope quality is getting rid of chromatic aberration, which can be improved by using lenses with a lower refractive index (such as those made of fluorite rather than glass). This bends the light less, leading to clearer magnification.

The rocket design is similar to cruise missiles, in that it uses a jet engine rather than a rocket engine. Cruise missiles will follow an almost direct path to their target, and have the ability to adjust direction at any point. Ballistic missiles cannot.

The blocky thing shown here could be a stylized vacuum column tape drive, a device for storing data on magnetic tape (the black ribbon in cassettes) to be used in computations.

One of these devices is the IBM 7090, which was used by NASA to control space flights in the 60s.

The map shows that the KoS may be aiming to land around Goa in India.

Assuming they don't stop, the journey via the Suez is >10 days, and >23 days via the Cape of Good Hope.

The Banana Canal seems to be how the villagers remember the name of the Panama Canal, which is odd because bananas only grow in the very south of Japan (if at all) so they're unlikely to have been familiar with them before reaching South America.

The Suez is a man-made canal that gets drained and cleared every 10 years so the boats can pass through unobstructed. The area has also been mostly desert for thousands of years. Sandstorms would soon fill it in, making it impassable.

What Ryusui is worried about here is probably similar to the Ever Given back in March, when winds ran it aground, blocking the whole canal. It had to be dug out to be freed, which the KoS can't do here. Turning around or backing up is also impossible if the canal is too narrow.

Kohaku is the only power/fighter team member here, and she's definitely making sure to represent the hot-heads! Getting revenge on a canal, trying to destroy things…

Chelsea's old banners made a comeback, which isn't surprising since fabric is tedious to make. Reuse is the basis of Senku's science after all!

But more importantly, how the H-E-L-L did it survive those 7 years when everyone was petrified?!

The dam shown looks more like a beaver dam or a deliberate structure than something that naturally got packed like that. The way it follows onto the land is a little odd to me as well… Something could be hiding underneath?

Senku always makes sure to number his rockets.

(I spent too long wondering if this was a pun, but the i-shi/stone pun is for 1-4, and "Dr. One" doesn't quite fit how "Dr. Stone" is pronounced…)

The rocket has two sets of controllers, one used by Senku on the ship and the other by Ryusui about half way to the dam. It's unlikely that this choice is due to range issues, as the cell phones worked 80 km apart and this is only 20 km.

It's probably so that Ryusui can pinpoint the landing while Senku takes care of the launch.

The coordination between them is impressive!

India has likely been chosen as Math City because of its long history of mathematics dating back over 3000 years, before Europe had made similar advances. They invented many important concepts, such as negative numbers, the idea of zero, and decimal points.

The other option for India being Math City is that it has many natural resources useful for making computers and other electronics, however I think we'll have to wait until future chapters to see why they chose it!