It's reasonable for me to have a two-way foil for a second-level civilization, right?

"The other part is from Mount Sharp."

"Rain? Mount Sharp?" Lu Yongchang frowned suddenly.

These two sources... Mount Sharp can explain a little better.

After all, during the drilling and detection of Mount Sharp, the existence of a large number of underground ice layers was indeed detected.

In ancient times, it is also possible that there were glaciers on Mount Sharp.

just rain...

Lu Yongchang's eyes moved slightly, and he said in a low voice.

"Zero, continue the simulation, the surface temperature of Mars rises by 70 degrees Celsius, what is the result?"

After the words fell, a red image of Mars appeared in front of him.

Over time, the ice caps at the poles of Mars melted rapidly, releasing large amounts of carbon dioxide and methane.

The injection of greenhouse gases has greatly improved the ability of Mars' atmosphere to keep warm.

Subsequently, water vapor began to condense, and rain appeared on Mars.

Oceans and lakes followed.

Mars Recovery Simulation Map

A blue and red planet appeared in front of him.

Chapter 197 Andrew?please call back

Lu Yongchang was not too surprised by the fantastic scene in front of him.

In other words, such a picture is actually quite normal.

Water is not uncommon in the solar system.

It's just that because of the temperature, most of them exist in solid form.

Various signs in Gale Crater have shown that liquid water existed on Mars in the past.

According to previous inferences from the scientific community, Mars had core activities 40 billion years ago.

Thanks to this, although it is not as good as the earth, the environment of Mars will not become what it is now.

At least, it should be possible for liquid water to exist on its surface.

Lu Yongchang couldn't help but fell into deep thought.

What caused Mars to become what it is now?

"Professor, according to the latest news sent back by Captain Bai Yixuan, a catastrophic flood occurred in Gale Crater about 39 billion years ago."

Zero's voice sounded again.

Scenes of scenes appeared in the holographic image.

"This is..." Lu Yongchang frowned as he looked at the huge wave-shaped pattern in the picture.

"The individual height of reverse dunes is about 9m, and the distance between each reverse dune is about 140m." Zero quickly marked the detailed data of these wavy patterns on the holographic projection, "According to calculations, this is what was left by the flood. Mark of."

reverse dunes

"And after this great flood, the liquid water on Mars quickly disappeared and became what it is now."

Looking at the simulated images in front of him, Lu Yongchang nodded thoughtfully.

"The great flood 39 billion years ago..." he muttered to himself, "Zero, I remember that the Greek Basin, the largest crater on Mars, should have been formed 39 billion years ago, too?"

"Yes, Professor."

Faced with such coincidental data, he suddenly had some unreliable guesses in his mind.

"Zero, first simulate a Mars whose core has not cooled down."

After the words fell, a crimson planet with a relatively dense atmosphere and a little blue surface appeared in front of him.

Lu Yongchang nodded in satisfaction.

For Zero who has a lot of data, this level of simulation is relatively easy and accurate.

If there were no unknown accidents, this should be Mars 40 billion years ago.

At this time, Mars had just been born [-] million years ago.

It is conservatively estimated that life should not exist on Mars at this time.

The reason is simple, the time is too short.

Even the earth, which was born 46 billion years ago, did not show signs of life until 40 billion to 38 billion years ago.

"Go ahead and simulate the impact of the meteorite that formed the Hellenic Basin."

As soon as the words fell, a huge meteorite slammed into the Greek Basin on Mars with extremely powerful kinetic energy.

Upside down!

In just a split second, in Zero's simulation screen, Mars showed an extremely obvious change.

A large amount of magma overflowed from the inside of the earth's core, and some of the magma even broke away from the gravity of Mars and was thrown into space!

Time passed quickly.

A large amount of magma was thrown out, gathered in space, solidified, and formed two satellites.

Phobos and Deimos.

As for Mars, after losing so much magma, the core cooling process accelerated rapidly.

But as the core cooled and the magnetic field disappeared, another big thing happened.

The heat brought by the impact of the meteorite completely melted the ice caps at the poles of Mars!

Subsequently, the greenhouse gases and water vapor worked together to briefly turn Mars into a warm and humid planet!

Under the torrential rain all over the world, the azure and red planet once again appeared in front of Lu Yongchang!

Good times are not long.

This suitable living environment, as the core cools, the magnetic field disappears and quickly dissipates.

The powerful solar wind blows away the atmosphere of Mars, and the original ocean gradually dries up.

Gradually, Mars became what it is now.

"call……"

Lu Yongchang exhaled deeply.

The scenes in front of him just now, like an epic disaster movie, deeply shocked his heart.

After a moment of silence, he asked again: "Zero, how long did Mars last in the final stage?"

"Professor, according to the simulation, the ocean formed by the flood should have lasted for about 2-3 million years." Zero quickly said, "The liquid water in the remaining small areas has insufficient information and cannot be judged."

"Enough." Lv Yongchang's eyes froze, and he said in a low voice, "This time is enough to evolve some basic life forms!"

"Zero, tell Bai Yixuan to be careful when bringing back the sample, there may be residual microorganisms in it!"

……

Mars, Gale Crater.

The several-day drilling, sampling and mapping mission exhausted the energy of six astronauts.

The two Xuannv No. [-] stopped quietly on the vast red land.

Inside the cabin of the first Xuannv No. [-] ship.

Hong Fan, who was wearing a protective suit, carefully carried three space suits covered with wet Martian dust to the cleaning room.

In order to prevent microbial contamination, these spacesuits need to go through a full range of disinfection and cleaning before they can continue to be used.

The improved space suits are not heavy, even if the three suits are added together, Hong Fan can still walk with three space suits easily thanks to the lower gravity of Mars.

Thinking of the task updated not long ago, the corners of Hong Fan's lips rose a little.

They need to send the drill samples back to Mars City.

This means that they can have a good night's rest in the city of Mars.

This is undoubtedly a big temptation for them.

Recalling the soft bed in Mars City, Hong Fan's footsteps became a little lighter.

The spacesuit in his hand flipped up and down a little bit more.

suddenly.

A small drop of dark red moist Martian sand fell on the deck of Xuannv [-].

The next moment, Hong Fan's electromagnetic boots stepped on it.

After a slight friction, this small drop of moist Martian sand was evenly spread on his electromagnetic boots and the deck of Xuannv No. [-].

The traces became blurred.

……

"Brother Fan?"

"Has the spacesuit been cleaned and disinfected?"

When Hong Fan returned to the cockpit, Xia Wanyi's questioning voice came.

"Of course." Hong Fan sat on the chair while reaching out to fasten the seat belt.

"Captain, can we go back?"

Bai Yixuan, who was sitting in the main seat, turned his head and glanced at Hong Fan, shrugged lightly and said, "When Andrew and the others are ready, we can set off."

Said, Bai Yixuan pressed the team radio switch.

"Andrew, are you ready?"

"..."

no respond.

After waiting for a few seconds, Bai Yixuan raised his brows lightly, and pressed the communication button again: "Andrew? Please answer!"

Still no response.

Chapter 198 Call Mars City!we are polluted

"Andrew?!"

"Please answer if you receive it!!"

Bai Yixuan, who hadn't received a response for a long time, had a strange expression on his face.

"One, retrieve the camera images inside the No. [-] starship!" Bai Yixuan said in a deep voice.

As the captain of the six-member team, he naturally has the authority to check the status of Andrew's starship.

The holographic image on the console changes quietly.

The picture in the cockpit of the No. [-] starship appeared in front of everyone.

No one is empty.

Seeing this scene, the expressions of Bai Yixuan and the others changed.

At this moment, the words that Professor Lu said on the radio appeared in their minds.

'According to zero's simulation results, the environment of Gale Crater in ancient times is very suitable, and there is a great possibility that primitive life will appear. Be careful of microbial infection when transporting samples! '

The impatient Hong Fan had already unbuckled his seat belt and stood up.

"Something must have happened!"

"I'm going to help them!"

With that said, Hong Fan turned and walked towards the cabinet beside him.

In the cabinet, there are three clean space suits.

"Stop!" Bai Yixuan's expression darkened, and he shouted loudly, "Hong Fan! Come back to me!"