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　In the end, 121 disks were found. Of these, 78 were broken. In other words, 43 disks are still intact.

　Of the 78 broken disks, 30 disks were missing because no pieces were found.

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"Well, I can only assume that someone or something broke them."

　It was also hard to believe that the would do something so illogical as to deliberately break the backup .

"Father, there's a bone over here."

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"What?

　Reiko's voice made me rush over to her, and I found the bones of two medium-sized animals lying on the ground.

　After 20,000 years, the bones were tattered and looked as if they would shatter at any moment.

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"Did they blend in, ......?"

　Or was it the pet of someone who worked here?　Or was it a pet of someone who worked at this place? There is a strong possibility that this animal broke the <.

"By the way, there was also a dog that was taken to Antarctica, wasn't there?

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　The dog must have been rescued by the Antarctic expedition that visited the South Pole the following year, but here ......, Hitoshi imagines more.


　700672 says, looking at the skeleton.

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<


　Leaving the bones of the animals untouched, Jin decides to examine the magi-machine in the next room across the passage.

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　<
"I wonder if this one has the same function?"

　Jin's opinion is that this is not the case, but it is impossible to say for sure since there is a method called in hard disks, where the same data is recorded on multiple media.

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"Well, I guess we'll find out, won't we?"

　Jin-D cooperates with Reiko and removes the exterior.

　What appears is a magi-machine in the same form as the one in the next room. However, it cannot be determined from this alone that they have the same function.

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　While Jin D was investigating various things, he received an advice from No. 700672.


"I see."

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　Jin and Reiko searched for a backup <>, thinking that they were using the same type of storage devices side by side.

　However, they could not find a single disk here.

"I guess that happens sometimes."

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　Jin has stopped obsessing about it.

　Originally, Jin had found this place when he was looking for a base to build his own.

"Maybe we can preserve this Magi machine as an archaeological site.

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　Jin thought of this and decided to install air conditioning for the time being.

　Of course, air-conditioning must have been installed at the time of use, but there is no such equipment to be found now.

>, speculated No. 700672.

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　700672 guessed.

"That may be so.

　Jin agrees with this opinion.

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"Let's go back and think about it.

　Jin was anxious about the < in his possession.

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* * * *



　Jin D went to Horai Island. As for Jin himself, he went to the Nordic Federation.

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　To analyze the , of course.

　So far, the only place where he can analyze the disk with little risk is the residence of No. 700672... ...<>.

Jin-dono, welcome to my base.

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　Jin was greeted by 700672, who had returned to the base one step ahead of Jin through the warp gate.

"Sorry to disturb you, sir."

"Is that the at ......?"

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"Yes."

　Jin handed the that Reiko had given him to the .

"Well, ...... it looks a little different from what I know, but ...... let's check it out."

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　Even the CDs, DVDs, and Blu-ray discs used on Earth have several different standards, and if they don't match, they may not be readable.

　This <> is nearly 20,000 years old, and uses technology even older than that of the <> who created the 700672. >>The technology used is even older than that used in the 700672.

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"Let's check it out first."

　There are 43 safe <. They are numbered.

　The highest numbered one, which is the most recent record ......, must be more than 10,000 years old, is in the hands of <>7 00672, which is probably 10,000 or more years old.

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"Let me start with something a little less degraded."

　Saying this, No. 700672 went to the magi machine in the corner of the <>.

　From Jin's point of view, it looks like a DVD player.

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　He opened the top cover of the magi-machine and tried to insert the < into the rounded depression,...... but the size of the disk did not fit.

"...... I knew it."

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　700672 let out a small sigh.

"What do you mean?"

"My must not have had much contact with the who made this ...... or even the who built that facility."

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　That reminded Jin. < is an individualist.

"You mean that they are not standardized?"

"That's what I mean."

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　Jin sighed.

　It seems that <> had set up a standard for each narrow community of himself and his friends.

"I guess that wasn't the case in the beginning, though."

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　Jin thought that since units and letters were common, everyone must have shared the same information at that time.

　Jin wonders what the history of such has been like since then, when it became so individualistic.

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"...... Jin-dono, do you also have a broken <?"

"What?　Yes, there are.

　Since we don't know in what format the information is recorded, we would like to check it first with something that can fail," said 700672.

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"Here, take this."

　Jin handed 700672 30 missing pieces that were unlikely to be recovered. The smallest of the 30 pieces was taken out by 700672.

"Now let's use this."

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　The 700672 put the piece into a different magi-machine from the one he had just used.

"Now, this is to examine the crystal or molecular structure of the object.

　The 700672 operates the machine while explaining to Jin.

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"This < seems to be made of corundum crystals on artificial ...... sintered alumina.

　Furthermore,

"<> are a recording medium that uses the crystalline structure of the surface."

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　The <> adjusted several lever-like knobs.

　Jin, who has never seen such a magi-machine before, is very curious.

"Hmmm... ...... this is a video recording."

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　On the monitor in front of the 700672, an image, albeit indistinct, was projected.

"Well, ...... it looks like this is a topographical map.

　Since the information is from debris, it is not clear where the topographic map is.

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（It looks like some kind of microfilm.)

　It does not seem to be a digital record, Jin thought.

"I'm not sure about this one."

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　700672 analyzed another fragment and found that it appeared to be an exterior view of a building.

　The other 28 pieces were all video recordings.

"So this is the way they recorded the building. It's really interesting."

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　Records left by the ancestors of the people who created you.

"It will take some time. Jin-dono, can you lend me these crystal disks for a while?

　I will definitely report the results, but it will take a while to analyze them," said 700672.

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"Yes, I understand. Thank you very much."

　Jin readily agreed. He decided to return to his original goal of building his own base.

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