Liquid metallic hydrogen is a degenerate substance, an allotrope of the diatomic molecule H2.

When hydrogen is sufficiently compressed, metallic hydrogen is produced after a phase change.

It has been speculated that there is a large amount of liquid metallic hydrogen in the interior of Jupiter-like planets such as Saturn and Jupiter.

But what Su Han didn't expect was that there was also a large amount of liquid metal hydrogen on this Altai star.

Liquid metallic hydrogen is an efficient and clean source of energy, and the end product is only water.

When this fuel is burned, it will be more intense than ordinary hydrogen, releasing nine times the effect of ordinary hydrogen and five times the effect of space shuttle fuel.

Liquid metal hydrogen is also one of the most scarce resources in the Dragon Country at the moment.

This time, Su Han organized interstellar exploration, and its purpose was to explore more resources.

After learning that there was a large amount of liquid metal hydrogen on the Altai Star, he did not hesitate to directly put a large amount of mining equipment into preparation for the mining of liquid metal hydrogen.

The Dragon Kingdom has been researching this new type of fuel for a long time, and naturally has its own means of exploitation.

After spending almost a week on Altai, and once enough liquid metallic hydrogen had been mined, Liberty set sail again!

This time, Su Han not only wanted to explore more resources, but the main purpose was to explore the existence of other civilizations.

So, Liberty flew through space.

During this time, Su Han has visited Grand Bay Star, Northern Ursa Star, and many more planets that have not yet been named by humans.

But to Su Han's surprise, no signs of life could be found on these planets.

This made Su Han a little puzzled!

In Murphy's memory, there was an indescribable civilization in the universe.

Why did you sail through the universe for so long and still not discover the existence of other civilizations?

In fact, what Su Han didn't know was how vast the universe was.

At this time, he was still in the Great Mager Galaxy, and what he saw was only the tip of the iceberg in the universe.

As long as he crosses the crystal wall of the galaxy, he can see countless civilizations and planets where they live.

Of course, during this time, Su Han did not gain nothing.

The long interstellar exploration also allowed Su Han to find a lot of rare metals.

At this time, Su Han was like a 'landlord'.

Everywhere you go, you will be scavenged.

And the Liberty also has a lot of resources on board.

"Team Leader Su, at this time, we are almost 20,000 light-years away from Longyuan Star, if we explore further, I'm afraid the energy of the spaceship is not enough to support us to return to Longyuan Star."

Su Han heard the staff's report and sighed slightly in his heart.

It seems that it is time to return to Longyuan Star as well.

But just as Su Han was about to give the order to return, the staff in charge of the exploration suddenly exclaimed: "Team Leader Su, look, there are signs of life on the planet on our right. ”

As soon as these words came out, Su Han immediately rushed to the console and took a closer look.

Su Han found that not far from the Liberty, there was a planet suspended.

The area of this planet is not very large, but its internal structure is somewhat similar to that of Longyuan Star.

"Choose the landing spot, let's go over and have a look."

Soon, the Liberty was heading towards the planet.

After entering that planet, Su Han suddenly found that there was gunpowder smoke everywhere on this planet.

On the earth, there are countless big pits!

It's as if you've just been through the baptism of war.

After the Freedom landed on this planet, Su Han walked out of the hatch with a part of the soldiers with the Shenwu mecha.

As far as the eye can see, this is a primeval forest.

But the huge trees fell to the ground, and the surrounding vegetation was burned by the fire.

Countless fireworks floated from the ground and deep into the sky.

Although this primeval forest has been destroyed.

But you can vaguely see the previous scene of this primeval forest from these traces.

When an experienced soldier saw this scene, he said with a somewhat solemn expression: "Team Leader Su, if I am not mistaken, this planet has just experienced a big war. ”

Hearing this, Su Han nodded slightly, and then walked out of the primeval forest.

Because of the existence of the Shenwu mecha, it was very convenient for Su Han and them to walk on this planet.

But the more he went inside, the more frightened Su Han became!

Because the scope of this 'war' is extremely wide, involving almost the entire planet.

This indiscriminate attack has devastated the originally vibrant planet, and even killed most of the life on the planet in this battle.

And, judging by the corpses on the ground, it was a one-sided battlefield.

Seeing this, another soldier who was following Su Han couldn't help but sigh lightly: "We have been walking for so long, and we haven't seen any living life, so we can conclude that there was an extremely tragic war here." ”

"I'm afraid that the natives on this planet have all died at the hands of another civilization, and as for the signs of life we detected just now, I'm afraid it's just the last spark on this planet."

"This is probably a massacre, and the civilization that invaded this planet has the absolute strength to crush them."

When Su Han heard this, he felt a little sad and a little happy at the same time!

If it weren't for the memory inheritance of Murphy, I'm afraid the people of the Dragon Kingdom would have the same fate!

At this moment, Su Han decided to raise the civilization level of Long Yuan Star at all costs, so as to protect the people of Long Kingdom.

Although Su Han knew that there were still very few life forms on this planet.

But he didn't plan to explore it to the end!

Natives who have just experienced aggression must have been very hostile to other beings.

If I appeared in front of them at this time, I am afraid that the battlefield would break out.

Although Su Han was not afraid of the natives of this planet, he was not willing to clash with them.

Soon, Su Han returned to the Liberty.

After Su Han returned to the Liberty, the Liberty took off again and flew away from the planet.

What Su Han didn't know was when the Freedom had just flown off the planet.

In one corner of this planet, there are dozens of creatures that look like humans without a doubt, but have two tentacles on their heads.

The creatures looked at the massive spaceship with a look of hatred in their eyes.

This is the planet's indigenous 'Ant-Man'.

Although this group of people just now is not the same group as the people who invaded their planet.

But Ant-Man resents these invaders to the extreme.

It is because of them that such a beautiful home has been reduced to ruins.

On the Freedom, Su Han didn't say anything for a long time!

I don't know how long it took, but a sentence suddenly popped out of his mouth: "If one day, the Civilized Dragon Kingdom must also launch an invasion in order to survive, how should you choose?" ”

Very above, everyone was stunned when they heard this!

They never imagined that one day, they too would become aggressors.

At this moment, time seems to stop here.

Oh, yes!

Maybe one day, the dragon kingdom will become like other civilizations.

So, what choice should they make when the time comes?