"I speculate that it is a laser pointer with a power of about 6 petawatts, and its purpose is to shoot high-intensity, dense ultraviolet beams into space. It consumes 3,000 times more electricity per second than the Earth. Wit continued.

Geoscientists have been working on laser pointers for a long time. Today's most powerful laser pointer is only 2 petawatts.

This ultra-powerful pulsed laser only runs for one trillionth of a second, and it can't run for a long time, let alone use it.

The ultra-high-power laser pointer is like a super-large lighthouse, using laser signals to guide extraterrestrial civilizations to Earth and attract the attention of aliens.

To illustrate this most aptly, after entering the deepest and darkest night, someone suddenly turns on a searchlight that can blind the eyes on the seashore and shines on the endless, rough sea.

And shouted, "Hey! We're here! Come here, there's someone here! ”

Ruan Lin stared closely at the alien civilization pointer that took up most of the screen.

While thinking about the actions of geoscientists exposing the location of the earth, Ruan Lin felt mixed feelings: humans are not alone! Extraterrestrial civilizations exist, and they are far more civilized than we are.

If we make a pointer, it's to attract extraterrestrial civilizations. So why is this civilization launched in the solar system? Is it to serve as a relay station to send signals to the mother civilization?

Ruan Lin had an idea: "WIT, collect sedimentary rock samples under and near the spaceship, and compare the samples at a distance.

We don't know what the craft is made of. But its original location is certainly not in the upper layer of the earth, and I suspect that it is due to countless years of Martian sandstorms that make it almost reappear!

Two samples were brought back to the spacecraft for an isotope decay test. From this, we will correspond to the development nodes of our earth's civilization and see what their purpose is! ”

"As you wish." WIT's answer is always so reassuring.

"I hope that its purpose is not to report the situation of the solar system to its own mother civilization, but to hope that this civilization is good."

"It is estimated that it will take an hour to collect the samples and test results, so please wait." wit said.

Ruan Lin remembered the most famous civilization theory on Earth - the Dark Forest. But there is no chain of suspicion at this time. Now it's just an infinite speculation on Ruan Lin's side without knowing the other party's motives.

But Ruan Lin retained the most basic 'goodwill' when he thought about it: treating the other party as a civilization with 'basic goodwill'.

If they don't have any purpose but evil tastes to destroy humanity. Destroying Earth's civilization over the past hundreds of millennia is easier than trampling an ant to death.

And this laser pointer should be some years old, even if the other party is really an extremely malicious civilization, their spaceship would have flown to the solar system a long time ago, instead of now it is only lying alone on the back side of Mars.

"Dr. Nguyen, the test results are out. You're right, a sample from this area was compared with another sample and the results showed that the sedimentary rocks in the area had changed 3 million years ago.

That is to say, this pointer is about 3 million years old, and the error of the detection result will not be greater than less than 50 years. ”

The test results caused Ruan Lin to ponder: 3 million years ago, that is, the time when the world's first ape-man appeared was recorded in history.

What exactly did this pointer crash for? Or land here? Why did you choose such a point in time? To observe humans who have not yet fully evolved?

If I were the leader of this civilization, for what purpose would I launch a laser pointer of such great power in the solar system? Where is it pointing? What is the purpose?

Ruan Lin sat and stared out the window. It is as if penetrating matter and arriving in another world.

Ruan Lin suddenly raised his head: "Wit, I need you to simulate the position and rotation of Mars 3 million years ago today. One more point. Based on the pointer that crashed here, the trajectory of the crash and the orbital position it was in at that time were inversely calculated. ”

"Okay, no other strings attached. The simulation will take up 28% of the computing power. Please wait for the results of the simulation..."

It's a three-million-year rewind.

It didn't take long for the simulation of WIT to complete.

The screen prominently displays the positions of the eight planets in the solar system and the position of the Martian orbit where the pointer is located.

The location of the pointer is impressively pointing to the nearest and largest asteroid to Mars, Marriage God.

It's in a large asteroid swarm, and it seems to stand out from the crowd.

Ruan Lin probably came to a conclusion: "Wit, if we leave for the Marriage God Star now, how long will it take?" ”

"It lasted about 5 days, but escaped from the Earth and the Moon; will be one step ahead of us. If we set off now, we will be hit by countless debris, and the risk factor is too high. ”

In this neutron star-induced destruction of the Earth and Moon, some of the Earth-Moon fragments will become asteroids of the Sun, revolving around the Sun forever.

Some of them will become comets in the solar system.

And the deadliest part, they will exceed the third cosmic velocity, first scattering in all directions, and finally flying out of the solar system.

And 65 million years ago, an asteroid with a diameter of 10 km crashed straight into the Earth at a speed faster than the third universe, causing the fifth mass extinction known as the fifth mass extinction.

Ruan Lin secretly looked forward to it: "Yes, our spaceship can't afford to toss like this. Let's wait for the massive 'debris rain' to fall before we set off..."

Forty-five hours later, WIT gently opened the deep sleep pod and said intimately: "Good morning, Dr. Nguyen, the Earth-Moon debris will arrive on Mars in five minutes, and a small satellite probe has been launched, and it will soon start to transmit images synchronously." The observation equipment is ready. ”

The 'debris rain' that Lin had been looking forward to arrived as scheduled.

This is the most spectacular 'fireworks' in the solar system, and it is also the sad song of the last curtain call of the Earth and the Moon.

Through the screen, Ruan Lin had already seen fragments like missiles.

There were countless small fragments leading the way, followed closely by the more massive fragments. But only the larger ones – the largest of them did not exceed 50 meters in diameter.

In front of the culprit of the fifth mass extinction 65 million years ago, it is just a level of small things.

Not long afterward. Debris passed through the Martian atmosphere. But Mars is obviously not as lucky as Earth, and the density of the Martian atmosphere is too low to burn and block most asteroids and meteorites at full strength, which is why Mars is already riddled with holes.

They resemble demons that have just escaped from hell, glowing pure white and orange under the meager atmosphere of Mars, with a long white trail behind them.

The debris slammed unhindered onto the surface of Mars, and the 'fireworks' would last for up to an hour.

Even if someone was standing on the surface of Mars now, he could only hear a faint rumble.

But his eyes and feet could clearly feel what the planet was going through—the huge white, orange flashes that barely stopped, the blinding light that kept him from opening them. There seemed to be an endless stream of strong vibrations under his feet, and he couldn't stand on his feet. Everything was as terrifying as the end of the world.

And Mars. After this attack by the Earth-Moon debris, it will add new scars to its potted surface.

The life that survives the Earth-Moon fragments may also leave the seeds of life on Mars.