The people shrouded in light disappeared from the sight of onlookers after a moment.
After a long time, the onlookers calmed down.
At this moment, Lu Xiao received a message from Doctor.
[Prepare for action]
These four short words shocked Lu Xiao.
Then he muttered in his heart, "It's actually ready so quickly."
Although he was confused, Lu Xiao didn't think much about it.
Regarding Doctor's work efficiency, Lu Xiao still has some understanding.
After bidding farewell to Yi Hao and others, Lu Xiao and Dart arrived at the gathering place previously agreed upon with Doctor.
In this operation, in addition to Lu Xiao and Dart, there is also a stand-in for Doctor.
Because he is a stand-in, Lu Xiao and the others don't have to deliberately protect his safety.
Doctor The things that need to be prepared are mainly some water pumping equipment.
However, looking at the water pump that was as big as a small Villa, the corner of Lu Xiao's mouth couldn't help but twitch.
A question arose in his mind, "Can this thing be made in two days?"
Fortunately, I brought Dart with me on this trip.
Dart consciously took on the responsibility of transporting the big Captain.
The three of them flew quickly towards their destination.
With the humming sound of the water pump.
The water level in the hot springs drops rapidly at a speed visible to the naked eye.
The other end of the water pump is connected to a metal cube.
Inside the metal cube, there is an independent space.
Obviously, this thing was also created by Doctor.
The water pumped out by the water pump is put into this independent space.
I don't know how long Past has been.
The water in this hot spring has finally been drained.
What was originally a wild hot spring has now turned into a huge pit as deep as a hundred meters, just like a mine.
Only then did everyone see the real underwater scene clearly.
Under the water, there are densely packed bones.
These bones have different shapes, and their surfaces are all covered with minerals.
Lu Xiao suddenly took a breath. "Are these bones from the same creature?"
At this time, Doctor said in a deep voice, "Let's go down and take a look."
The three of them looked at each other, then Dart grabbed Doctor and jumped into the huge pit.
Lu Xiao hurriedly followed.
After a short period of descent, the three of them landed at the bottom of the pit.
The bottom is soft black-gray silt, and exudes an unpleasant fishy smell that belongs to the earth.
It is obviously realistic to want to walk on this muddy bottom.
So, in the end, Dart grabbed Doctor and 'walked' at the bottom of the pit by flying close to the ground.
The three of them took a walk underwater.
Doctor counted the number of bones at the bottom of the pit.
He thought for a long time, and then said in a deep voice, "I saw three types of bones with different characteristics.
Three Gods level creatures should have died here."
You know, this is not Dark Prison on the surface.
Dark Prison is on the surface, Present World is underground the Depths.
In other words, there were three Gods who died in this Planet underground the Depths.
Dart said in a deep voice, "Who put these bones here?"
Doctor did not explain this problem.
He took a deep breath and then said, "A long time ago, I was thinking about a question.
How Creator opened up this world.
In my opinion, it is much more difficult to open up an underground world than to immigrate other Planets of the same Galaxy.
Creator Since it has the ability to open up underground space, why not modify the environment of the neighboring star.
As long as a Planet has an atmosphere, it means it has the necessary conditions for habitation."
Having said this, Doctor paused for a moment, and then continued, "Looking at it now.
It should be that the underground already has a world framework.
This framework solves the problem of gravity.
It is precisely because of the support of the frame that the sky did not collapse."
After hearing this, Lu Xiao almost understood what Doctor meant.
He said in a deep voice, "You mean, there was originally a world underground.
In other words, the existence of a civilization?"
Doctor nodded slightly and then said, "If nothing else happened, this underground civilization would have been extinct long ago.
What Creator did was to modify the environment of this world into an environment suitable for human habitation."
Hearing this, Lu Xiao was surprised and said, "But this doesn't make sense.
Wasn't Director sent underground to a New World that was replaced by the Depths?"
Hearing Lu Xiao's question, Doctor said solemnly, "You haven't seen that New World.
The framework of New World is very crude.
The height from the ground to the ceiling is not very high.
When he created that world, in order to conceal this phenomenon, he disguised the 'ceiling' to look like a Universe starry sky."
As he said that, Doctor pulled up the corner of his clothes, then took out a pen from his pocket and drew two circles, one large and one small.
The big circle wraps the small circle.
Then, Doctor drew a small U-shaped line inside the small circle and close to the edge of the circle.
Immediately afterwards, Doctor pointed at the big circle with the tip of his pen and said, "This first circle represents Dark Prison on the ground.
Outside the circle is the Universe starry sky."
Then Doctor pointed to the smaller circle in the middle.
"This is Present World where we live now.
If we add the concept of gravity to the middle circle."
Saying that, Doctor folded up the corner of the clothes.
At this time, the corners of the two circles are stuck together.
Immediately afterwards, Doctor rubbed the corner of his clothes again.
The outer circle became wrinkled, and the lines drawn on it also looked a little distorted under the rubbing of Doctor.
At this time, Doctor said in a deep voice, "Under the action of gravity, the outer circle will continue to collapse.
The two circles will eventually overlap."
After saying that, he pointed to the horizontal line inside the small circle.
"And this is the latest world created.
You can think of that place as a large underground cavity.
And this underground cavity is relatively stable.
I use a U-shaped line close to the edge of the circle to express it, which means that it will not be affected by gravity like the outermost circle.
Those two vertical lines also play a supporting role."
After saying that, he pointed the tip of his pen at the blank space between the two circles.
"There is the most essential difference between these two situations.
The U-shaped line is itself a frame.
And in the middle of these two circles, there is something without any support to resist the influence of gravity."
Having said this, Doctor took a deep breath, and then said solemnly, "If we add some invisible vertical lines to this blank area, we can ensure the integrity of this structure.
These invisible vertical lines may exist naturally, or they may be added by the previous civilization that existed in this world."