The Earth People are so Fierce

Meng Chao and the explorers set up a circle of firepower points near the portal, forming a small jungle fortress.

A large number of mines were laid outside the fortress.

Last time, a small team of Lu Siya also mysteriously disappeared behind the minefield.

This time, in addition to landmines, they also installed a large number of spar bombs with delayed detonation.

This kind of bomb requires humans to send a safety signal at regular intervals to continuously delay the detonation time.

In the unlikely event of a human encounter, the bomb will automatically detonate, exploding a large amount of smoke generated by the friction of spar powder, providing the most conspicuous fire guidance for the heavy artillery clusters dozens of kilometers away.

After completing all this, Long Feijun and Meng Chao mobilized a group of the most elite exploratory team members, carrying nearly a hundred "Bread Crabs" and "Peregrine Falcons" on the road.

This is because the "Piranha" team and the Lv Siya team have surveyed and mapped most of the topography in the misty area, and left a large number of special radioactive beacons.

The third wave of exploration team progressed very smoothly, neither lost in a gap in space nor encountered a vicious monster.

The "green tides" on both sides of the mountain path were motionless as if they were sleeping, turning a blind eye to the "invaders".

Only deathly silence, like a cold scalpel, constantly scratched everyone's cerebral cortex.

Especially in the ten exploratory teams, all approaching the Tiankeng from different directions, the anxiety in Meng Chao and Long Feijun's hearts became even stronger.

"Senior Long, do you think our actions are too smooth?"

Meng Chao finally couldn't help but whispered, "If this is really a'natural laboratory', the mastermind behind the monster civilization, at least we should arrange some ears, eyes and guards here to create some trouble for us?

"Hundred-legged insects are dead but not stiff. Although the monsters have been beaten by us on all fronts in the past six months, the final defeats will be concentrated. It is also a force that cannot be underestimated. It really depends on the fog. The poor mountains, evil waters, green tides, and blood-stripe flowers in the hermit domain are really hard to deal with if you resist.

"Why, according to the map, we are all approaching the heart of the monster civilization-the mysterious sinkhole, and there is still no movement around?"

"It's indeed gone too far. When we were in war, what we feared the most was not the vicious monsters, but the unknown monsters we had never seen before. The unknown is the most troublesome."

Long Feijun frowned, "But, we can't just turn around and run away just because our actions are too smooth?"

This is naturally impossible.

Besides, ten exploratory team leaders drove straight in, surveyed and mapped a lot of terrain, proved the direction, reserves and composition of many spar veins, and found many dense forests, green tides, and strategically valuable bombing targets. False trip.

No matter how many conspiracies the monster civilization hides, it will be wiped out under the indiscriminate bombardment of mankind-the people on earth are so simple and rude.

The two were muttering, the "Bread Crab" who was walking in the front to explore the way suddenly flashed a green light.

This is the signal to reach the destination.

Passing through a few sloping trees, the branches are entwined together like an arch, and there are vines hanging down, like a towering tree that looks like a curtain. The front is suddenly open, and the mysterious tiankeng crashes into everyone's vision without warning.

"hiss--"

Like all the explorers, Meng Chao couldn't help taking a deep breath.

Traveling for too long in the dark, damp, cramped jungle, the human mind is gradually entangled by claustrophobia.

Suddenly seeing the tiankeng surrounded by clouds and mist, like a huge lake with blue waves and misty water, the visual impact is indeed refreshing.

However, the large lake surrounded by mountains is often more terrifying than the deep sea.

Let alone this is not a lake.

It is a sinkhole containing the ultimate secret of monster civilization.

Between the surrounding mountains, there is always a beast-like gale.

When the wind blows away the clouds and fog, Yingying Chuo Chuo can see the shaky "sky jungle" hanging in the middle of the tiankeng.

In addition to the emerald green moss, lichen and fungus blanket, there are also a lot of colorful flowers and fruits growing in the jungle.

It's just that the colors of all plants are extraordinarily bright, so gorgeous that they are about to rot after being injected with low-quality pigments.

If you don't know the details of the green tide, this scene might give a sense of vitality to life.

But when I think of the deep jungle, where there are hundreds of millions of monsters, the bones of hundreds of millions of monsters are very likely to accumulate, and the exploration team can't help but shudder.

This is because clouds and mist are constantly gushing out from the Wushen Mountain behind the tiankeng, blocking the line of sight and disrupting human surveying and mapping equipment.

It is temporarily impossible to see the situation opposite the tiankeng, nor can it measure the circumference, diameter and depth of the tiankeng.

However, occasional winds blow away the clouds and fog, and the arc of the tiankeng can be seen.

The tiankeng is not straight up and down, but like a semicircle.

This is in line with the characteristics of meteorite impact.

On the edge of the tiankeng, the exploration team found some crystal clear, glazed rocks, which should be the product of different crystals and metal veins melting and condensing together under extremely high temperature and pressure.

"So, this is a crater?"

Meng Chao asked the geological experts in the exploration team.

"It's strange, this big crater fits all the characteristics of a meteor crater, but..."

Geological experts quickly tapped on a military computer to combine and calculate a large number of parameters. The data and curves on the screen became more and more abundant, but his brows became more frowning.

"However, there are two things that are strange. First, this meteorite is too big." The geologist shook his head while analyzing it.

Meng Chao and Long Feijun looked at each other and continued to ask: "The meteorite is too big, what's the problem?"

"something wrong."

The geological expert showed the computer screen to the two people. “Although we cannot accurately map the diameter and depth of the tiankeng, we can estimate the cause based on the relative distance between us and the other nine exploratory teams and the radian of the tiankeng. The meteorite of the tiankeng, its approximate volume and mass

"The problem is that the meteorite travels through the sea of ​​stars, is captured by the planet's gravity, travels through the atmosphere, and finally hits the surface of the planet, the speed must be extremely fast.

"When I input the minimum mass and minimum velocity of the meteorite we estimated into the computer, the output impact power is much more than ten times that of the meteorite impact that destroyed the dinosaurs on Earth.

"You must know that the mass of the otherworld is the same as that of the earth, and the composition of the atmosphere, the thickness of the crust and the law of plate movement are not too different. A meteorite impact that is ten times more powerful than the destruction of dinosaurs can completely use the'crisis of extinction.' To describe it, it is bound to bring extremely profound changes to the surrounding terrain and landforms of thousands or even thousands of miles.

"However, although the topography from the Hidden Fog to the Monster Mountain Range is fragmented and rugged, relative to the mass and speed of this meteorite, its power is still too small, too small and too small."

Meng Chao and Long Feijun were confused: "So, why is the impact of meteorites less powerful?"

"The power of a meteorite hitting the planet is determined by its speed and mass."

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The geologist said, "If the mass of the meteorite is about the same as we estimated, it is that its speed is far from as fast as we imagined-it did not come from a gallop from outer space, but was dropped from a very close place. ."

"Well, the martial arts department I studied in university, can you explain it more generally?" Meng Chao humbly asked for advice.

"For example, drop from low earth orbit."

The geological expert said, "In this case, the impact power becomes smaller, and it is understandable."

"Low Earth Orbit..."

Meng Chao and Long Feijun looked up at the sky together.

The sky was firmly obscured by grey mist.

It seems to be an invisible copper wall and iron wall that lay across the atmosphere, blocking the planet and space.

Dragon City has been through for more than half a century.

With the space exploration capabilities of the Earth era before the journey, the Longcheng civilization with complete military facilities, of course, could not launch manned spacecraft and deep space exploration satellites, and launched some meteorological balloons that cruise above the atmosphere. The technical reserves are still possible.

But all the weather balloons, high-altitude reconnaissance planes, and one-off small rockets launched by Longcheng were blocked, strangled, and destroyed by some mysterious force before they rushed out of the atmosphere.

"War God" Lei Zongchao told Meng Chao that he had also tried to use the power of magnetic levitation, floating all the way, trying to use the power of the gods to rush out of the planet called "Alien" and see its full picture from outer space. .

With Lei Zongchao's cultivation base, the low temperature, lack of oxygen and radiation above the atmosphere did not constitute a fatal obstacle.

But when he reached the edge of the atmosphere, he was stopped by a mysterious force.

That power was more terrifying than any doomsday beast he had encountered.

Lei Zongchao's original words were: "It took me down like a fly."

To this day, outside the atmosphere of another world, there is still a forbidden zone for the people of the earth.

Launching satellites into synchronous orbit and erecting man-made facilities is even more whimsical.

Among the memory fragments of Meng Chao's past lives, there are only a handful of powerful life forms known as "other world gods and demons", which can freely shuttle inside and outside the atmosphere.

However, according to geologists, a long time ago, there was some kind of power that dropped a huge meteorite from a synchronous orbit outside the atmosphere of another world to create this tiankeng?

This kind of scene is so vast, just thinking about it makes people feel shaken.

Meng Chao took a deep breath, settled, and asked, "What else, you said there are two strange things, what is the second one?"

"Second, we have found a lot of geological features that are unique to volcanic craters on the edge of the tiankeng," said geological experts.

Meng Chao was confused: "Wait, is this a crater or a crater?"

"Not good."

The geological expert slowly shook his head and said, "The energy falling from the sky and the energy gushing from the ground have completely different changes to the surrounding environment. However, the samples we collected from the edge of the tiankeng, after preliminary analysis, are Both changes are combined, it's like...

"It seems that a huge meteorite was bombed from low-Earth orbit and hit a volcanic crater that was outputting energy crazily."