"We were sent by the Prophet to an unknown space, and by the time we came out, a nuclear explosion had already occurred. We were dumped at the Qinling camp with only a crow next to us. Lao Xu smiled bitterly.

They didn't understand what was going on, but common sense told them that even the prophets had no chance of surviving in that situation.

At least, they didn't see the Prophet hiding in.

Perhaps, it's like a bucket that can't fit itself into.

"Crows?"

"Hmm...... It looked listless, didn't eat or drink, and was temporarily raised by the girl named Su Xiaonuo. She was the adopted child of the Prophet......"

"Help her well, whatever she wants."

After completing the meeting with the fire, everyone did not leave, but stayed at the station and waited.

One after another, more trains stopped from all directions.

"Pick up the person at the Lower Southwest Shelter, responsible for leading the large army to the Qinghai-Tibet Plateau refuge."

"This is Donghuang Medical College, which is responsible for fighting altitude sickness, volcanic ash lung disease, and mass infectious diseases in this great migration operation.

Sufficient oxygen tanks and medical equipment are being transported along the Qinghai-Tibet Railway to the highlands. As for the large medical equipment that is inconvenient to transport, it has been made mud and waterproof treatment, buried on the spot, and can be excavated and used if there is still spare energy in the official migration. ”

"Here are the Tianshan Mountains, Kunlun Mountains, Altai Mountains, and Altun Mountains to guide the team, which can help divert the traffic."

Du Mingyue clenched her fists and watched more and more people join the migration reserve, her excitement and emotion made her chest seem to stir something.

"People from the northwest, southwest, and southeast are here, but what about the people from the new anti-Japanese alliance in the northeast?"

"The snow was too heavy to pass the train, so we couldn't take refuge in the high ground like we did. So they decided to fight the flood directly, take snow on the spot, and build an iceberg themselves! Wait for the official Great Migration to join us. ”

“……”

I can only ask for more blessings.

Because of the recent nuclear explosion, people do not dare to stay outside all the time, so as not to be affected by the radiation fallout.

Soon they took action.

"You go first, I'll have to wait for someone." Gan Chongzhi said suddenly.

"Who?"

"Two physics professors, they once discovered the law of non-conservation of universal symmetry, so they won the Nobel Prize, and their research in the field of microscopic particles can be called living legends, walking masters."

"Professor Li and Professor Yang?"

"Yes, maybe they will answer one of my long-standing questions about why the asteroid has zero mass, what exactly it is made of, why it carries so many horrible tails, and why it causes gravitational chaos."

"That'...... Wait a minute, let's meet at the Jungnan Mountain Shelter. Thundering Squad, remember to protect the professors. After the Prophet left, they were a beacon. ”

。

Gan Chongzhi's thoughts fluttered.

In 1687, Newton wrote the famous law of gravitation.

This is the first time that mankind has realized that there is a natural attraction in all things, and it has solved many of the puzzles that have plagued mankind since its inception.

- Why the celestial bodies move regularly, why the earth revolves around the sun, why apples fall and fall on Newton's head.

However, the law of gravitation only states that gravity exists, and humans never know why gravity exists and why it can interact with each other over great distances!

In 1913, Albert Einstein proposed the theory of gravitational field, which he believed that there is a gravitational field around any object, and the gravitational field exists in curved space-time, and the gravitational field propagates through gravitational waves, which are gravitons that attract objects to each other.

But this has not been confirmed.

At the same time, with the rise of electromagnetism, physicists tried to apply gravitational field theory to the template of electromagnetic field, and combined classical mechanics and quantum field theory to explain the birth of the four fundamental forces.

After that, scientists successively confirmed the cause of three of the four fundamental forces through experiments.

The electromagnetic force is realized by the exchange of virtual photons, the strong interaction force is achieved by the exchange of gluons, and the W and Z bosons are the carriers of the weak interaction force.

These discoveries have brought mankind one step closer to Einstein's grand unification theory.

The next thing is gravity, as long as the existence of gravitons can be confirmed, the last piece of the puzzle can be put together!

However......

The other three forces have been confirmed, but the gravitational force, which was first known by mankind, has become the final boss!

Can't find it, can't find it at all!

What is its exchange carrier? Was it born because of the space-time distortion in general relativity, or is it an unknown particle in quantum field theory?

The study of the causes of gravity has been inconclusive for a long time.

Neither general relativity nor quantum mechanics can reach a unified conclusion about the existence of gravitation.

Humanity's gaze seems to be stagnant here, unable to take a step forward and explore the deeper origin of the universe.

People can't find gravitons, and gravitons have become one of the most sacred topics in physics.

If the mystery of gravity can be solved, in the study of black holes and the Big Bang, general relativity and quantum mechanics can work together to solve the ultimate mystery of the birth of the world!

However.

In the blink of an eye, many years have passed.

Applied technology has exploded in popularity at an almost exaggerated rate, and human civilization has rushed towards the imaginary cyber era at a speed that is almost incomprehensible......

However, the understanding of gravity is still standing still.

It seems that it has broken through the limits of what humans can reach, and it will never be able to touch it in the unreachable void.

Until......

A crazy and never-verifiable hypothesis was put forward -

String Theory.

String theory holds that the world is made up of one-dimensional strings of pure energy, and that different elementary particles are just different ways in which strings vibrate.

When John Schwartz tried to explain fermions with string theory, he accidentally got a "particle with a mass of 0 and a spin of 2" in a mathematical model.

However, this particle does not exist in any particle model known to man.

John Schwartz once tried to eliminate this "wrong" particle from the model, but the horror was ......

No matter how he eliminates it, this particle will appear in the model in a variety of forms!

It wasn't until a few years later that people suddenly realized.

Could it be that this kind of particle is the ...... that countless scientists have been looking for all their lives?

Graviton?!

"Zero mass, two spins!"

Gan Chongzhi looked up at the sky.

Through the black oppressive clouds, he seemed to see the beautiful ring that bound the waist of the earth, and the invisible ghosts that diffused in the ring and maintained its existence.

He still remembered what the man had said at the time.

[The mass of the asteroid is zero, and the gravitational pull is in an uncertain state......]

It's like a ghost from the physical world, it shouldn't have existed.

But it exists!

。

On the night when Gan Chongzhi met the two professors, on the other side, people had already gone to the tomb of Qin Shi Huang.

A faint blue light and shadow condensed from the dirt of the main burial chamber, and he was stunned when he looked at the chaotic scene in front of him.

Eventually, the eyes were on the brand-new septic tank.

The expression of the old man in the subway looking at his mobile phone was revealed.