...

While waiting for the remaining 14 mice to wake up, Lü Yongchang sat down in a chair and slowly closed his eyes.

Driven by his will, he entered the technology tree system space once again.

The white light spread rapidly, illuminating a previously dim cursor.

[Hibernation Technique: Initial Mastery!]

Then, a point of light extended out from the cursor.

Seeing this, Lü Yongchang was slightly taken aback.

besides?

After hibernation technology, what other technologies are there?

The light gradually dimmed, and a cursor with only about 10% brightness appeared in front of him.

[Overweight State Balancing Technology: Deep Sea Mode]

Lü Yongchang subconsciously focused his attention on the cursor.

A wave of dizziness washed over me.

That familiar feeling made Lü Yongchang panic.

Good heavens, is he going to faint again?!

Surely not?!

Perhaps because the system was continuously strengthening the brain and body, the dizziness lasted for a few seconds before slowly disappearing.

As the dizziness subsided, a sudden realization slowly surfaced deep within his mind.

So that's the technology...

Starting with Xuan Nu I, spaceplanes, or starships, have become increasingly faster and faster, and their acceleration capabilities have also become increasingly stronger.

With the help of anti-G suits, professionally trained astronauts and pilots can tolerate a maximum G value of approximately 12G.

However, the G-value that the average person can accept is only around 3-4.

This is a bit too small for interstellar travel.

Even if future starships could indeed reach 1% or 10% of the speed of light, the acceleration time required would be unimaginable!

Moreover, prolonged exposure to high G-forces is extremely harmful to the human body.

A few minutes might be bearable, but if the time is extended to days, months, or even years, I believe no one can endure it.

Therefore, humans need a technology to balance internal and external pressures under conditions of hypergravity.

This refers to the deep-sea mode provided by the system.

The so-called deep-sea mode is actually somewhat similar to breathing underwater.

This technology has actually been studied for some time.

Perfluorocarbon (PFC) liquids.

It has an extremely strong oxygen-dissolving capacity.

Therefore, some people have tried to use this liquid to replace air for "underwater breathing".

But reality is cruel.

Perfluorocarbon liquids have an extremely high density compared to air.

A normal person's lung capacity is simply not enough to breathe it normally.

Even with a large lung capacity, if a person cannot expel all the fluid from their body, they will quickly die from pneumonia and a series of complications.

After sorting through the knowledge points in his mind, Lü Yongchang sighed slightly and slowly opened his eyes.