Popular science says oxygen is poisonous, and the whole internet scolds me for being sick

Normally, every astronaut is extremely valuable.

It can be said that they are carefully selected from each country.

Every one of them, whether in terms of physical or mental character.

They are all the most suitable for performing space missions.

It can be said to be the pinnacle of human quality.

But the situation on the American side is very strange.

Each astronaut completes one mission and then retires.

There was one and only one trip to the moon.

Normally speaking, people who have been there are very experienced.

He should be a suitable candidate for the next mission.

But no, all the ones that went up.

They all completed the mission only once and ended their astronaut careers.

Then they will be selected again from a group of pilots.

Everyone knows that the pilots are selected from the best of the best.

In many cases, astronauts are selected again from pilots with rich flying experience.

People suitable for the space environment were selected for training.

Almost every time I start from scratch.

As long as you go to space once.

There are various influencing factors in space.

The effects of cosmic radiation and zero gravity.

The most important thing is the psychological level.

After going there once, many astronauts felt like they had walked through the gates of hell.

They don't want to go through this journey again.

Because every astronaut who goes up there.

All previous training has been reset to zero.

If you want to be selected again, you can only continue to participate in training.

If you can't meet the requirements, you won't be selected.

Although some people who have gone on feel that they can still go on.

But without exception, they are not as good as the newcomers in selection and training.

Dr. Kaiser explained to the newcomer, "So far, no one has ever been to the moon twice."

Dr. Kaiser held up two fingers.

"There are personal factors involved."

"There is something more important."

The new guy didn't understand, "What other factors are there?"

Apart from personal reasons, why can we only go to the moon once?
Is there any restriction here?

The newcomer couldn't figure it out.

Dr. Caesar looked at the newcomer's puzzled face and finally solved the mystery.

"Our bodies are too fragile." Dr. Caesar sighed.

"If it's just a space station, then it still falls within the scope of our blue planet's atmosphere."

“You can go up there multiple times, and even travel into space.”

“But the moon landing was different.”

"Gravity and the environment have changed."

Dr. Caesar and his team know the astronauts who came down from the moon.

Underwent a comprehensive physical examination.

They were found to have various health problems.

"The pressure on the human spine is greatly reduced, and the cartilage between the vertebrae becomes longer."

"Generally, the height will increase by two or three centimeters."

"In the weightless environment of space, the body is always in a floating state, lacking gravity stimulation, which leads to muscle atrophy and decreased strength."

"Even bones will start to lose calcium due to gravity, and bones will become brittle."

"So people who go to the moon and come down will easily break bones."

"There is also the problem of blood. The heart will not be able to adapt to gravity, causing blood to rush to the brain and face."

After hearing what Dr. Caesar said, the newcomer realized that going to the moon was so painful. No wonder they had to undergo hellish training on the ground.

Because if you are not careful, you may die in the universe.

"So after going up there, it's like being in a weakened state."

"The chances of being selected again are very slim," explained Dr. Kaiser.

The newcomer seemed to understand something, "But Dr. Caesar, the truth is probably not that simple."

Dr. Caesar nodded appreciatively, "You are indeed smart enough."

"Yes, these are just some of the factors on the surface."

"Actually, the key point is on the moon." Dr. Caesar's face became a little gloomy.

"Why do you think we went to all that trouble to send a rover up there?"

"Just to show off our strength?" Dr. Caesar shook his head.

"Like I said before, with the rover."

“There’s a lot more scope to explore.”

"Otherwise, astronauts wouldn't be able to get very far if they just walked."

"And why we land on the lunar equator every time."

"Because we really found something incredible on it." Dr. Caesar's voice became more and more excited.

"According to our general understanding, there is no one and nothing on the moon."

"It should be a barren land, with nothing but stones and dust."

“But during the first two manned moon landings.”

"Astronauts say they always feel like someone is following them up there."

“It always feels like something is watching them.”

The newcomer wondered, "There shouldn't be anything on the moon, so how could something be watching them?"

"This shouldn't happen. Is it their psychological effect?"

Dr. Kaiser shook his head and said, "I also think it's just psychological."

“But the first two manned moon landings said that.”

"Especially Armstrong, they were in the process of landing on the moon."

"We discovered that there was a strange light following our rocket."

"After arriving on the moon, they also discovered three strange spots of light."

Dr. Kaiser talked about this phenomenon.

In fact, someone has already observed this.

And more than once.

Because with the development of technology, there are many moon enthusiasts on the blue planet.

What these astronomy enthusiasts like most is to observe the moon.

It’s just like the ancient Chinese people appreciating the moon.

It’s just that our ancients saw with their naked eyes.

Modern people can use various machines to take pictures.

"After Armstrong and his team came down, they reported the incident to us."

“Everyone started paying attention, but there was nothing they could do.”

“It wasn’t until the second time that we paid special attention to this aspect.”

"There really are UFOs observing us," Dr. Kaiser said.

Although the tone was flat, the newcomer inexplicably felt a chill on his back.

"Are they watching us?" The newcomer thought of a possibility.

Connect this to what Ye Zhen said before.

"In subsequent explorations, we discovered an ancient spaceship." Dr. Caesar's tone began to sound strange.

"An ancient spaceship nearly three thousand meters long."

When the newcomer heard this, he dropped the pen in his hand in surprise.

His mouth was open wide enough to fit a light bulb.

"An ancient spaceship of three thousand meters?" The newcomer took a breath and repeated it.

This piece of news echoed in the newcomer's mind like thunder.

Dr. Kaiser laughed, "Hahaha, when I first found out, I was much more shocked than you."

"It is from this discovery that we know about the civilization era before humans!" (End of this chapter)