Blood was pouring out of the wound, and bones were breaking.

A smell of blood that belonged only to human blood filled the air.

The dark night is becoming brighter with the passage of time.

There's an artificial sun day!

It's been six days since the sun last rose.

Luo Chuan burst out with a high-pitched roar deep in his throat, the same as those that were conceived in the darkness.

Where darkness enveloped them, the flow of time slowed down, it seemed as if blood and other fluids were starting to thicken, and vision was blurry, and it was like a movie slowing down at a triple rate.

Luo Chuan tried to open his eyes, he could barely see anything around him, not even Nangong Tian, he couldn't feel it.

"Nangong Tian" Luo Chuan shouted with all his strength, but the voice was still suppressed by the surrounding sounds.

Soon, Luo Chuan realized that there was no sound around, and those messy, chaotic, and unbearable sounds did not come from the outside, but from his own eardrums.

Luo Chuan never imagined that he would be trapped here today, and he was not even sure if this was the museum he was familiar with.

"Nangong Tian......" Luo Chuan shouted again, he had to find Nangong Tian, "Nangong ......"

"Alright," a weak voice came, "can you stop screaming, my ears are going to be torn apart by you." ”

"You're finally speaking up." Luo Chuan said, suddenly, he had a strange feeling - he didn't seem to feel his presence.

To confirm this, he reached out and pinched his cheek, and only after making sure that his face was still slightly aching did he make sure that he was really alive.

"Xiaochuan" Nangong Tian looked at Luo Chuan not far away, lowered his head and examined his hand again, his hand was pale and terrifying, "I feel as if my body has changed." ”

"Where has changed?" Luo Chuan tried to keep his eyes open, to be honest, he and Nangong Tian felt a little similar, he could also feel the strangeness of his body, but he was not quite sure what was going on. "I just feel a lot weaker."

Luo Chuan seemed to remember something, he raised his right hand, and the original pale green film of his right hand disappeared.

Luo Chuan's mind went blank, mechanically examining the other parts of his body, he stood up, took off his clothes one by one, and soon, his naked body was revealed.

Nangong Tian turned his head, and then pinched his nose with his hand, "It stinks." ”

"I said," Nangong Tianxia subconsciously took two steps back, "How long have we been sleeping, how do you feel that today's artificial sun is a little wrong?" ”

"Really?" Luo Chuan put on his clothes again, his face expressionless, "The artificial sun rises every six days, we fell asleep on the last artificial sun day, and woke up on this artificial sun day, and slept for a total of six days." ”

"Are you a fool?" Nangong Tian stood up and walked around the first floor of the museum, if he wanted to ask the question of the cycle of the artificial sun, he would never ask Luo Chuan, just imagine, as a mathematical genius who is extremely good at mathematics and physics, does he need an uneducated child like Luo Chuan, who has only read history books for a few days, to teach him the cycle of the artificial sun? "You don't understand what I mean, I mean the light of this artificial sun is a little different today."

Light?

Luo Chuan was stunned.

"The Sun is the central body of the solar system, accounting for 99.86% of the total mass of the solar system. The eight planets in the solar system, asteroids, meteors, comets, outer Neptune objects, and interstellar dust all revolve around the Sun, which revolves around the center of the Milky Way.

The Sun is a star located at the center of the solar system, and it is almost an ideal sphere intertwined with hot plasma and magnetic fields. The diameter of the Sun is about 1,392,000 (1.392×10?) kilometers, which is 109 times the diameter of the Earth; It is about 1.3 million times the size of the Earth; Its mass is about 2×103 kilograms (330,000 times that of Earth). In terms of chemical composition, about three-quarters of the mass of the Sun is now hydrogen, and almost all of the rest is helium, including oxygen, carbon, neon, iron, and other heavy elements with less than 2% of the mass, which uses nuclear fusion to release light and heat into space.

The Sun is currently passing through the local interstellar cloud in the local bubble of the Orion Arm at the inner edge of the Milky Way. At a distance of 17 light-years from Earth, there are 50 of the closest star systems (the closest star to the Sun is a red dwarf called Proxima Centauri, about 4.2 light-years).

The Sun is a yellow dwarf (spectrum G2V), the lifespan of a yellow dwarf is roughly 10 billion years, and the Sun is currently about 4.57 billion years old. In about 50 to 6 billion years, the Sun's interior will be almost completely depleted of hydrogen and the Sun's core will collapse, causing the temperature to rise, a process that will continue until the Sun begins to fuse helium into carbon. Although helium fusion produces less energy than hydrogen fusion, it is also hotter, so the outer layers of the sun will expand and release a portion of the outer atmosphere into space. At the end of the process of turning to new elements, the mass of the Sun will decrease slightly, and the outer layers will extend to the current orbit of the Earth or Mars (at which point the two planets will be farther away from the Sun due to the decrease in the mass of the Sun). ”

This is all the information about the sun in the solar system, Luo Chuan thought in his heart.

"The artificial sun is made according to the proportions of the real sun, and for a small undersea school headquarters, although this artificial sun is not as brilliant as the real sun, it is enough to purify the world of the undersea school headquarters." Luo Chuan said solemnly, and after speaking, he glanced at the light of the artificial sun shining through the gap in the door of the museum, "The artificial sun has been running for an unknown number of years, and there has been no problem at all, how can we confirm what is wrong with it now?" ”

He looked at Nangong Tian, he wanted to see how Nangong Tian would answer this question.

"I've been observing for a long time, and the artificial sun is about thirteen percent darker than before, and this alone can confirm that the overall brightness of the artificial sun is also much less."

Luo Chuan's brows tightened a little more, and he began to feel that what Nangong Tian said made sense.

The artificial sun has indeed changed.

And why did he and Nangong Tian sleep for a full artificial solar cycle, it was a full six days!

What really happened six days ago?

What's missing in this museum? What's more?

This is not the most important thing, what matters is why his body has become different from before, why has he and Nangong Tian become weak?