Ruri, Shoko, Nagi, and Imari take a trip together, where they search for meteorite at a hot springs inn.
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1. Mmm! So good!
2. Don't forget, we still
have to eat dinner later.
3. I'll be fine!
4. Enjoy it while you're still young...
5. Imari, you're still young, too.
6. I dunno, I've been really
scatter-brained recently.
7. You gotta remember to take breaks
every once in a while.
8. Totally!
9. Besides, this hot springs trip
is all thanks to you!
10. Whoa! It's so big!
11. Look Up, Examine, Search! And Next!
12. Look Up, Examine, Search! And Next!
13. Wow, this is amazing.
14. Not too shabby.
15. Look at this coffered ceiling!
16. Must have been inspired by the eclectic
pseudo-Western architecture!
17. And all these intricate details—
18. Looks like the entire inn
was designed that way.
19. What an amazing place!
20. Senpai, let's go look around!
21. Come on! This way!
22. Whoa, wait, Imari!
23. Imari-san can get a little
too excited sometimes.
24. Think so? I can't wait to become
a college student like her.
25. I could spend all my time on stuff I like.
26. Well, you actually have stuff you wanna do.
27. I wish I did, too.
28. But we had fun making that crystal radio.
29. Yeah, but it's finished already.
30. Come to think of it, Nagi-san and
Imari-san might have my ideal life.
31. What do you mean?
32. Well, they're smart and they have ambitions.
33. Wow, look! It's from the Meiji era!
34. I bet they have fun all day
with nothing to worry about.
35. I doubt their lives are that easy.
36. What about you, Tanigawa-san?
37. Have you thought about
your future or career path?
38. Hey! Look, Seto-san!
39. Tada!
40. Vacays get real once you wear a yukata.
41. Sure, I guess. So back to what I was saying—
42. All right! Time for us to explore the inn, too!
43. W-Wait, um, Tanigawa-san!
44. I can't help but stop and look at rocks.
45. Same here.
46. You guys out exploring, too?
47. Nagi-san!
48. I found something cool.
49. Wanna guess what this is?
50. I dunno, it looks milky?
51. White and kind of pretty, but...
52. Why is it shaped like a donut?
53. I happened to find it roaming around the inn.
54. Senpai! There's a Taisho era bath this way!
55. Whoa!
56. H-Hey, Imari!
57. It's this way! Follow me!
58. She said she found it at this inn.
59. I see some white rocks here, but...
60. Those aren't milky like this one.
61. I'm more curious about
this shape than the color.
62. It doesn't seem natural. Could it be man-made?
63. What could be this size and have a round hole?
64. Hmm...
65. A drain?
66. That looks way off.
67. What about a statue?
68. Could it be from the garden?
69. It's not this, either.
70. If it's not here...
71. Maybe it's not from outside.
72. This must be where Nagi-san found it.
73. So its shape was from this pipe.
74. But what is it?
75. Ruri!
76. Wow, you two found it yourselves?
77. Nagi-san! We found the rock
in here, but what is it?
78. If you wanna know, I can
take you to where it was made.
79. This is awesome!
80. It said it helps with circulation,
so it might boost metabolism.
81. I could stay in here forever.
82. Nothing beats outdoor hot springs.
83. Oh yeah, I almost forgot.
So, where are these rocks?
84. Right here.
85. Huh?
86. That rock was created by this hot spring.
87. I can tell there's something mixed in here,
88. but how can hot springs make rocks?
89. What's the main material?
90. Just the hot spring.
91. Or you could say that
the hot spring is the rock itself.
92. Ground
93. Hot springs are a type of groundwater.
94. Groundwater
95. Groundwater contains dissolved minerals
from the rocks it flows through.
96. Underground
97. But when groundwater reaches the surface,
temperature or pressure changes.
98. Temperature/Pressure Decline
99. Oxidization
100. Or components oxidize, causing
substances to return to solid form.
101. Solids
102. It turned white! This turns to rock?
103. Yup.
104. So that pipe was actually
clogged with this white stuff.
105. Known as hot spring deposits,
these accumulate on
everything the water touches,
such as pipes and bathtubs.
106. What builds up depends on the
composition of the hot spring.
107. I found a discarded pipe,
so I asked the inn if I could keep it.
108. Once it turns solid, pipes can get
clogged as soon as a few months.
109. That must be difficult to manage.
110. What kind of rock is it exactly?
111. I'm assuming mainly lime.
112. Hot spring water varies
depending on the local geology.
113. By studying it, we can learn
what's occurring underground.
114. Magma
(most common type in Japan)
115. Some hot springs come from rainwater
that gets heated over a few decades.
116. Others are derived from fossil water
that's been trapped underground
117. Fossil Water
Water-impermeable layer (such as clay)
118. Magma
119. Magma
(most common type in Japan)
120. for tens of thousands of years.
121. High geothermal heat
122. Mantle
123. Oceanic Plate
124. Ocean
125. Water
126. Some also come from ancient seawater
squeezed out of ocean plates underground.
127. Rises toward surface
along fault
128. That can take millions,
even over ten million years.
129. Ten million?
130. Hot springs like that exist?
131. Totally, and guess what?
132. We're literally in one right now.
133. This hot spring even contains
a small amount of magma.
134. In cases where water gets
squeezed out of the plate,
135. Water
136. if it occurs too deep
in the plate, the heat becomes
137. so intense that the rock melts
and forms into magma.
138. Magma
139. Up to ten million years
140. Pressure
141. Pressure
142. As the magma eventually cools and hardens,
143. Water
(water vapor)
144. the water separates out,
which is called magmatic water.
145. Magmatic Water
146. Rises toward surface
along fault
147. I had no clue magmatic water even existed.
148. So in a way, we're sitting in magma right now?
149. Magmatic water carries a lot
of the original magma's components,
150. and as it cools,
it creates many kinds of rock.
151. Even after it changes form, it still
holds traces of what it once was.
152. At this very moment, it's still
in the process of turning to stone.
153. It might be watered down, but hot springs
really might be rocks themselves...
154. By the way, Senpai.
155. I heard you turned down that offer
to work as a museum curator.
156. Yeah.
157. There aren't many openings
for rock specialists.
158. Isn't it a waste to pass up?
159. A waste... yeah, probably...
160. H-H-Hold on one minute!
161. Nagi-san! You mean you could
have been gone next year?
162. Only if I were accepted.
163. But why would you decline such a great offer?
164. You could research rocks for a living.
165. I still have ongoing research projects.
166. And I'd like to stay in school and
continue my research as long as possible.
167. Stay in school?
168. Meaning...?
169. My dream is to be a college professor one day.
170. That's awesome!
I'm sure you can do it, Nagi-san!
171. Thanks.
172. Whether it's a college professor
or museum curator,
173. job openings are going to
be super hard to come by.
174. If it's research you want to do,
it doesn't have to be at college.
175. Are you sure it's what you want?
176. Seto-san, you sound a lot like my professor.
177. That reminds me, Imari.
178. You mentioned getting both a museum curator
license and a high school teaching license.
179. What are your plans?
180. Apparently, there haven't
been any openings to
181. teach earth science
in our prefecture lately.
182. That's a pretty harsh reality.
183. I'd like to go into research too,
but if that's not possible,
184. I hope I can at least be involved
in earth science or mineralogy.
185. Sorry if this is a bit awkward to hear.
186. Who knew that even people like Nagi-san
and Imari-san have stuff to worry about?
187. It makes sense when you think about it.
188. Not a single person
in the world has zero worries.
189. Especially anyone who has
an ideal vision for their future.
190. I keep telling myself that,
but I can't help but worry.
191. No matter how hard it gets, I won't
give up on becoming a researcher!
192. Especially now that I've met you both,
I'll work even harder!
193. Please promise me you'll become researchers.
194. That way, I can follow in your footsteps!
195. Follow in our footsteps?
196. We're not all that.
197. But we can all try together.
198. Yeah!
199. Nagi's Respite
200. Japan has many volcanoes, and consequently, many hot springs. With approximately 28,000 source points, Japan ranks among the top countries in the world as the home to many unique hot springs.
Among them, the Tokachidake Shinshin Crater Hot Spring,
discovered and studied in the 1960s, is an exceptionally rare type of hot spring even by global standards.
The hot spring water that wells up there appears to be ordinary, clear, and colorless at first glance. However, its ultra-high concentration produces roughly 600 grams of deposits per liter.
When the water temperature drops, precipitation begins.
This sediment rapidly forms while absorbing water, to the extent
that reports claimed that the scooped up samples turned
completely solid before they could be transferred into a storage container.
It is an extraordinarily rare "solid hot spring," but with such a concentrated source, one might have trouble actually bathing in it.
201. Tokachidake Shinshin Crater
202. Today,
it's
referred to
as the
Showa
Crater
203. P
l
o
p
204. Oops
205. Nagi's Respite
206. The tiny world of dust particles actually contains an incredible amount of information, so much so that we usually don't even notice it.
For example, if you collect dust after watching some fireworks and examine it under a microscope, you might see colorful spheres. These are the remnants of the burning sparks. Even if the naked eye can't see any remnants, you'll find traces of fireworks under a microscope.
Fine artificial particles are often produced from sparks generated in factories. Even lighting a lighter produces tiny spheres.
Since the late 18th century, with the onset of the Industrial Revolution, particles like these have been found in geological layers around the world. These layers hold evidence of pivotal moments in history.
Conversely, you'll be hard pressed to find places completely untouched by human-made particles these days, with the only cases being the polar regions or remote deserts. Even areas that appear entirely natural often bear traces of human activity.
207. Particles from fireworks
are easy to identify
because of their vivid colors
208. Red, blue, green, yellow...
209. Same colors as the fireworks
210. Cheers!
211. Mmm, this is so good!
212. It looks good!
213. I could eat this all day.
214. Are you full?
215. Huh? Oh, yeah...
216. See, this is why I warned you
to save your appetite.
217. Fine, I'll finish it for you.
218. Th-That's okay...
219. Don't worry.
220. It's fine.
221. All right! We've got clear skies tonight.
222. Wanna go up on the roof?
223. Whoa! Look at all these stars!
224. Apparently, we can observe roughly
8,600 stars with the naked eye.
225. But over 90% of them aren't visible
in the city because it's too bright.
226. Out here, we may even be
able to see shooting stars.
227. Is there a meteor shower tonight?
228. Nope, nothing in particular.
229. Then isn't it impossible?
230. People tend to think you can only observe
shooting stars during meteor showers,
231. but they say there's up to ten shooting
stars every hour on a normal night.
232. That's one every six minutes!
233. So we've got a good chance.
234. Nice! Come on, meteor showers!
235. I could just gaze at this starry sky forever.
236. Yeah.
237. There!
238. Did you see it?
239. I did!
240. Look, another one.
241. Really? Where?
242. There again!
243. I saw it, too!
244. That makes two!
245. On to the next one!
246. Bored already?
247. I wish I could watch them forever,
but shooting stars fade so quickly.
248. Of course they do.
249. Nothing lasts.
250. If only I could have this fun forever...
251. So you don't want it to end, huh?
252. It's only natural to want something
for yourself before it burns away.
253. But it's over, isn't it?
254. Not quite yet.
255. We still have fun to look forward to.
256. How would you like
to get your hands on a shooting star?
257. Are you drunk?
258. You mean we can hunt for one?
259. Yup.
260. But don't they just burn and fade away?
261. There's more after that.
262. They may land somewhere after they burn out,
263. but their locations are impossible to find.
264. No need to find where they land.
265. We can hunt for them right here.
266. Meteors fall on this very roof.
267. There's no way that's right.
268. Maybe she really is drunk.
269. The truth behind meteorite falls is
vastly different from what you might think.
270. They say a meteor has to be at least
2 mm wide for us to see it in the sky.
271. But in reality, most meteors
that fall are smaller than that.
272. Mass Distribution
273. Diameter
274. Invisible
275. Visible
276. Barringer Crater
277. Arizona, U.S.
278. Only a tiny fraction are big enough to cause
any real damage when they hit the ground.
279. Most meteorites are actually very small
and fall without anyone noticing.
280. To be precise, a 0.1mm speck might land
on one square meter of Earth every year.
281. By that calculation, this roof should...
282. Definitely have some meteors!
283. So how do we find them?
284. Once they reach the ground,
meteorites move like sand dust.
285. Here
286. They often pile up
in roof corners or gutters.
287. Here
288. To collect them, we use powerful magnets
to pick up the substances that stick.
289. Powerful magnet
290. I've done that before!
291. But aren't some meteorites non-metal?
292. Great catch, Seto-san.
293. Stony Meteorite
294. If we look at meteorites as a whole,
most of them don't stick to magnets.
295. But those are actually
indistinguishable from rocks on Earth.
296. Stony Meteorite
297. Rocks on Earth
298. So we're counting them out this time.
299. Be careful!
300. Who knew that gutters could be tools
to collect meteorites that fell on the roof?
301. We got this much. Is this all meteorites?
302. We'll look for them
under a microscope.
303. So we have to wait to get back to the lab?
304. Actually, Senpai told me
about this, so I brought one!
305. Tada!
306. That's awesome, Imari-san!
307. Better safe than sorry!
308. Take the collected sand and spread it
in a Petri dish to search for meteorites.
309. And once we find one,
pick it up with a wet brush.
310. So what does a meteorite look like?
311. It has a spherical shape.
312. If you can see a unique
pattern on it, that's perfect.
313. Meteorites have patterns?
314. When meteorites fall to Earth, they undergo
changes due to friction with the atmosphere.
315. Evaporation
316. Cooled and Recrystallized
317. Melted
318. Chemical Differentiation
319. Meltable components aggregate
320. Refractory components accumulate
321. That in itself isn't unusual for rocks,
but only meteorites experience such changes
322. Tens of km/s
323. while rotating and traveling
at tens of kilometers per second.
324. All while rapidly rotating
325. That can sometimes result in a unique pattern.
326. So a round, funny-patterned rock. Got it.
327. But what does the pattern actually look like?
328. I can't really explain it in words.
329. I think you'll know when you find it.
330. For real? That sounds super exciting!
331. Overall, it's pretty dark-colored.
332. But they all look like normal sand grains.
333. Since it stuck to a magnet, is it all magnetite?
334. That's probably in there, too.
335. There's some funky-shaped ones.
336. Could those be it?
337. If it's not spherical, it's not it.
338. Here! I found a round one!
339. This isn't it.
340. H-How are you so sure?
341. No two specimens will stick together
like that if they're meteorites.
342. I'm guessing it's artificial,
like sparks from a factory.
343. I found a perfect sphere!
344. You're right.
345. It has a funny looking textured surface, too.
346. I found one, too. A textured sphere.
347. What color is it?
348. Black.
349. Same here!
350. We did it!
351. There's two of them, huh?
352. Can you find any more?
353. Found one.
354. Found one over here, too.
355. Then that's likely not a meteorite.
356. Why not? What's wrong this time?
357. Even considering the frequency
of meteorite falls,
358. it's not something we can find many of at once.
359. What you found is likely something artificial.
360. Man, finding meteorites is no joke.
361. Imari-san, would you like to look?
362. You sure?
363. How cute!
364. What's cute?
365. Whoa, it's a crystal.
366. Is this magnetite?
367. I think so. Isn't that octahedron so cute?
368. I didn't think we'd find cool crystals, too!
369. You can sometimes find them in the sand on mountain roads
370. Pretty crystals can get mixed
in if its locality is nearby.
371. These must have been carried
onto the roof by the wind.
372. Sometimes, you can find
minerals in unusual places.
373. Especially on a microscopic level like this.
374. Cool...
375. This was just dust piled up on a roof.
376. It looked like plain old dirt.
377. But it's actually a collection of artificial
stuff, or mineral crystals, or meteorites.
378. I had no idea how exciting it
could look under a microscope.
379. Collecting tiny, microscopic
mineral crystals sounds fun.
380. For sure!
381. If it's this small,
it could all fit on a glass slide.
382. Quartz
383. Magnetite
384. Pyrite
385. Sapphire
386. Great idea.
387. It'll be the world's smallest specimen box.
Only visible with a microscope.
388. We should make one!
389. Need a break?
390. Nope, it's fun. I feel
like I'm treasure hunting.
391. I had fun stargazing, but I had no clue
we could see them up close.
392. Yeah?
393. If you open your mind to what comes next,
394. you'll find there are tons
of interesting things around us.
395. You may even come across
a cool discovery simply by chance.
396. Yeah! I wanna keep collecting tiny crystals!
397. Then let's go look
for other kinds of sand dust.
398. Yeah!
399. Nothing lasts. Everything ends eventually.
400. If only I could have this fun forever...
401. I was wrong to think that.
402. If the same fun lasted forever,
403. I would never look for the next fun thing.
404. I would've never known the excitement
of searching for meteorites.
405. Nor would I have learned anything new.
406. When something fun ends,
that leads to the next fun thing.
407. I was able to change each time.
408. That's how I got here.
409. Found it!
410. This is it.
411. I knew it! I could tell!
412. What a weird pattern!
413. This looks more artificial
than anything else!
414. Can I see, too?
415. In the end, Ruri-chan's meteorite
was the only one we found.
416. I'm jealous.
417. You can try looking at home or at school.
418. The odds should be similar anywhere on Earth.
419. Yeah! I'm disappointed
I couldn't find one myself,
420. but I've never felt so close
to space as I did today.
421. And to think it didn't come
from a telescope, but a microscope.
422. It's odd, isn't it?
423. That's true.
424. Even now...
425. There are tons of tiny shooting
stars falling that we can't see.
426. You think there are rocks
floating in the wind right now?
427. Probably.
428. Nagi-san, you know what?
429. Before, all I cared about
was finding pretty rocks.
430. Yeah.
431. But now, I wonder why a rock is so pretty.
432. Or why it exists in a certain place.
433. I want to learn how it became so pretty.
434. Little by little, I've started
to figure that out.