Lu Ying rolled her eyes and raised the corners of her mouth slightly, "That's not necessary, I'm going to test you now."

With that said, Lu Ying took Yaxuan to the reading table in the library, followed the catalog and opened the catalog of the initial era.

"What is this section about?"

"History of Blue Star Migration Interstellar Development."

When Lu Ying heard the words 'Blue Star' and 'migration', she lowered her eyes and was surprised and a little moved.

She was from a past era, and in that era there were often people who bad-mouthed that humans would inevitably bear the consequences of over-development and damage to the planet's environment.

However, I didn't expect to see the consequences directly, without any cover-up, and cruelly presented before my eyes.

"When was Blue Star destroyed? What was the reason?"

Yaxuan put one hand on his cheek, his fair skin turned a light pink due to the backlog, and his watery deer eyes stared at her, "Few people are willing to ask this, Teacher Yin, why are you interested in this matter?"

"

You can't tell him, and you want to know how long it will take for you to go back before you encounter the destruction of Blue Star and the migration of the apocalypse, right?

Yaxuan said four words.

"Destroyed by natural disasters."

The detailed explanation version is: the originally recoverable ecosystem was completely unrecoverable, and terrible consequences struck like an overwhelming force. Humanity withered, and the living area gradually shrank. Global organizations unanimously determined that the Blue Star could no longer support human survival, and launched the interstellar migration plan.

.

"Probably in the year 3094 of the original Blue Star."

Lu Ying breathed a sigh of relief.

She doesn't have to deal with the apocalypse when she goes back, and can only wish for future generations to be blessed.

If this future is a given future, it will not be easy to change.

If you really want to change, you have to pay a huge price.

This is also the reason why the Yin Yang family has always prohibited traveling to the past and future.

"Teacher Yin." Yaxuan yawned, leaned over the table lazily, and scanned her face lightly, "You make me feel like I saw you somewhere else."

Lu Ying's body was filled with alarm bells.

She pretended to touch her short hair unintentionally, turned her head, and avoided his burning gaze, "No, right?"

"Really...?" Yaxuan's tone gradually became lower, he closed his eyes, and fell into a light sleep without any warning.

"Hey...Hey, classmate Ya, are you asleep?" Lu Ying asked him in a low voice.

Seeing that there was no movement from him, Lu Ying had no choice but to open this heavy history book by herself.

The current human habitat is divided into five major galaxies. Except for the third galaxy that collapsed many years ago, the remaining galaxies are scattered with scattered humans, and the actual living area does not even reach 20%.

The third galaxy was the initial settlement location of the human migration plan. At that time, resources were scarce and the remaining energy was not enough for ships to continue exploring outwards, so they temporarily took root in the third galaxy one after another.

And later on—

The most important prop, the energy crystal, was accidentally excavated in the scattered fourth star.

We are still studying its manufacturing methods. At present, humans have mastered the method of stimulating energy crystals to accurately supply energy. A small crystal is enough to reserve the energy of a planet for half a year.

Lu Ying thought of the energy crystal placed beside her desk on the day of training.

Anyone who has the means to obtain this thing must be extraordinary.

No wonder the academy center is unwilling to reveal too much.
Chapter completed!