Lei Wenjun didn't expect it.

He had just descended to the 28-meter area when he discovered such an astounding situation.

A footprint more than three times the length of an average human's—what kind of concept is this?

It's little known.

By measuring the size of a person's footprint, it is often possible to infer their normal height.

This technique is used quite a bit in criminal investigations, and authorities even have different calculation templates based on different shoe types.

In everyday life, we don't need to calculate too accurately; a more standard formula is that an adult's height equals foot length at age 13 times 7, plus or minus 3 cm.

So those basketball players often have larger shoe sizes, whereas Xiao Si's shoe size is only 36.

The foot length of an average adult male is generally between 22 to 26 centimeters, with an adult height ranging from 160 to 185 cm.

Let's take three times the foot length to be 70 cm for calculations.

If the creature that left the footprint is a humanoid, its height would be over five meters!

Even more chilling is...

How was this footprint left?

If the other party had fallen into the pit from the ground, that would be easy to say—the Tier Three Cloud Concealment Talisman had failed for over sixty years, so it's possible that some large monkey-type demonic beast discovered this cave and then fell into the deep pit during exploration.

But if the other party crawled up from below...

The depth of this pit is at least above 100,000 meters, which is the equivalent altitude of 11 Mount Everest stacked together.

A height of five meters suggests that the stress on this creature's bones and its energy consumption far exceeds that of ordinary people; if in such a case it could crawl up.....

It could truly be called a 'visitor from hell'.

Lei Wenjun is not a veteran zoologist, but judging from some other traces around, the footprint doesn't seem like it was left by falling.

Lei Wenjun hurriedly reported this news to the surface and then placed the prepared monitoring equipment at this location.

When he returns to the surface later, other personnel will come down to make a rubbing of the footprint.

Then he continued descending.

29 meters, 30 meters...

The depth of the dive kept increasing, with only the sound of the rope's pull remaining in the space.

However, what puzzled Lei Wenjun was.

During the subsequent descent, he did not find a second giant footprint.

This was somewhat abnormal, as if the footprint appeared out of thin air, with no trace of origin.

Fifty meters...sixty meters.

When he descended to the 80-meter position, only a halo of light remained overhead, with darkness all around, void of any light.

Meanwhile, for some reason.

Lei Wenjun suddenly felt an inexplicable chill in his body, especially in the exposed facial area.

He quickly took out a Sloen thermometer and gently scanned it around.

This thermometer is a piece of special equipment for polar scientific research and can theoretically operate in places as low as minus ninety degrees.

Two seconds later, a number appeared on the thermometer's screen:

2.3°.

As introduced before.

The area around the Damo Realm has three suns, and there is some special 'membrane' for protection outside, so the surface temperature is mostly constant.

Although it was only recently learned that it might snow over at Ya Que, suggesting that some specific regional environments are unusual.

However, the temperatures in the southern region here basically remain unchanged year-round, with only slight drops during the night—both the flora and creatures of Damo Realm have long been accustomed to such temperature variations.

The current temperature on the ground is 27 degrees Celsius; 80 meters below the ground belongs to the constant temperature layer, and the temperature, at its lowest, is around 20 degrees.

In some places, the temperature might actually be higher due to Earth's frequent geological activity conveying energy.

If descending below a kilometer, a temperature reaching 7.80 degrees is very normal.

Even if there is a top opening connecting the pit to the surface, the internal temperature couldn't possibly approach below zero—Lei Wenjun has descended into local pits several hundred meters deep before, whether artificial or natural, and the temperature could not be so low.

That is to say, the temperature in the area where he is must be problematic.

Just then, a voice from Lin Ziming came through Lei Wenjun's earpiece:

"Director Lei, are you alright?

I saw on the monitoring equipment that your heart rate and blood pressure seem to have some changes."

Lei Wenjun felt his body carefully and replied:

"I'm not in much trouble, it's just that the temperature below the pit is a bit low, already close to zero degrees, so the body is responding.

Don't worry, Colonel Lin, I'll report back voluntarily if I can't hold on."

While saying this, Lei Wenjun continued to set up the monitoring equipment.

Compared to the giant footprints at -28 meters, the area at -80 meters was much calmer, with no special anomalies found.

This is actually the normal state of scientific research, tedious and repetitive.

Of course.

It's also because of this tedium that every new discovery can be so exhilarating.

Then Lei Wenjun continued his descent.

The suit he wore, similar to a diver's, had some thermal and cold resistance, plus Lei Wenjun himself, always running around, had commendable physical fitness.

Without exaggeration, the total lap count that five fellow hidden people could run together would probably be no match against Lei Wenjun alone.

Someone once, out of sheer boredom, gathered data and found that geotechnical engineering experts have an average lifespan over eight years longer than ordinary people, and just a few days ago, a sixty-year-old geological expert signed up for a 30-year-old marathon group using his son's ID card and won second place.

What? You ask why he didn't win first?

Because the first place was a civil engineer. (This is a true story)

It was out of confidence in his own physical fitness that Lei Wenjun boldly continued his dive.

Eighty-two meters....eighty-six meters...ninety-five meters.....

When Lei Wenjun descended to just over 100 meters, the surrounding temperature had already dropped to minus two or three degrees.

This time, under Lin Ziming's request, the exploration team set three heights:

28 meters, 80 meters, and 150 meters underground.

The first number isn't an integer for both apparent and actual reasons.

The apparent reason is simple:

-28 meters is the area inside the pit where natural light completely fails to illuminate, calculated based on the sun's highest tilt angle.

The real reason is...

A non-integer value looks sophisticated, which gives people an impressive feeling.

Ahem...

Truthfully, before the probe, no one expected the temperature at the pit's bottom would drop so quickly.

So if nothing unexpected happens, it might not be possible to reach the 150-meter depth.

At 100 meters.

Lei Wenjun stopped, cupped his hands, blew on them for warmth, and rubbed his face.

As he was steadying himself on the rock wall, preparing to dive further, he suddenly went "Huh?" softly.

Then he looked towards the rock wall his left hand was resting on.

The reason for Lei Wenjun's curiosity was simple:

The rock wall he touched at that moment was no longer that elastic clay form, but a rather hard sandy surface.

Obviously, the rock type had changed.

As a geologist, he must record and analyze this change; it's his professional field.

However, just as he turned on the spotlight to look at the rock wall, the next second he exclaimed:

"Damn, how could it be this thing?"

....

Note:

I just discovered a way to solve the problem of being notified 'You have reached today's limit' when watching a video.

After watching a video, go back to the bookshelf page, re-enter, find a chapter, and watch the video at the end to earn points again. It's been tested and works effectively, allowing six or seven views, and doesn't conflict with subscribed chapters.

Also, today is 8.15, please remember history and don't forget national humiliation.

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