When the sea goes low, it leaves white foam.

At 10 p.m., for this relatively traditional town, there are few people near the coastline, let alone rocky areas far from the beach.

Bi Fang stood on the top of the towering cliff, and from his position, the black and gray sea surface was undulating, and the tens of millions of tons of sea water slowly rose and gradually deflated, like a terrifying sea beast stirring the wind and waves under the water, stirring up the wind and waves.

Waves several meters high crashed against the cliffs at their feet, and the light of the lighthouse in the distance swept monotonously across the sea.

With the help of Mandy and Keko, Bi Fang laboriously put on his wetsuit, put on duck fins, and then made a detour from the bottom of the cliff into the shallow water.

Bi Fang and Mandy were responsible for the installation of underwater cameras, and Keko was on guard and guard on the shore.

Mandy put on his goggles and joked, "I thought you were going to jump right from above, like the movie protagonist, jumping off a cliff into the sea and narrowly surviving." ”

"You seem to have some misunderstanding about me."

Bi Fang bit the breathing valve and rolled his eyes.

It's not a live broadcast, the situation is not critical, first, I don't pursue a sense of picture, and second, it's unnecessary, a fool will take the risk of jumping into the sea, isn't it fragrant to go to the sea ordinary?

"I'm sorry, but you've always made me feel like this, like ...... Uh, that kind of personal hero movie? ”

"If you have time to talk about this, it's better to save some strength to go into the water, we only have two oxygen cylinders, and you are not from Bajau." Bi Fang said no more and threw himself into the sea.

In order to facilitate the carrying of supplies, the two of them did not carry many oxygen cylinders, only two per person, which required them to fight quickly.

"Bajau people? What is that? Mandy suffered the loss of being uneducated again.

Bi Fang didn't explain, and went straight to the water.

It's really a mystery about people's potential.

Zhang Shun, the "white strip in the waves" in the classical "Water Margin", and Jiang Ping, the "river rat" in "Three Heroes and Five Righteousness", can all lurk in the water for several days, even if heroes like Li Kui and Bai Yutang are dragged into the water by them and poured a belly of water, they can only turn their backs and abandon their armor.

Lying in the water for a few days and nights is an exaggeration of the ancient literati.

In the absence of diving equipment, the average person will not be able to dive in the water for more than two minutes, and even the current Bi Fang, without carrying any auxiliary equipment, can only move for about five minutes.

However, the Bajau people living in Southeast Asia can dive into the sea water at a depth of tens of meters to fish and dive for pearls without wearing a pair of goggles and no other equipment, and the diving time is more than 5 minutes, sometimes even as high as ten minutes.

With this ability, the Bajau people have lived on boats and fishing at sea for thousands of years, rarely setting foot on land.

The word "Bajau" means "people of the sea" in Indonesian.

It's nonsense to say that Sherpas have one more lobe than the average person, but the Bajau people who are good at diving are indeed born out of phase, and their spleens are 50% larger than those of other populations.

When they dive into the water, the spleen contractes, squeezing the oxygenated red blood cells into the blood vessels, increasing the oxygen content of the blood by up to 9%, thus extending the dive time.

So theoretically, the larger the spleen, the more advantageous the dive, and the spleen of the deep-diving seal has a larger proportion of the body than other animals.

The extra-large spleen of the Bajau people is not the result of acquired diving exercises.

Even non-diving Bajau people have larger spleens than those of other races, which is genetically determined.

The Bajau people's PDE10A gene mutated to increase the level of thyroid hormone T4, which promotes the enlargement of the spleen, giving the Bajau people extraordinary diving abilities.

Bi Fang felt that with the ability of the system, he might be able to give him such a strengthening.

Maybe the world diving champion will be himself in the future.

Seeing that Bi Fang didn't mean to explain, Mandy shrugged his shoulders: "Hey, sometimes I really envy you who are natural divers, like me, you can only win the world championship by working hard." ”

"You go down for me."

Seeing Mandy fully dressed, Keko kicked him in the ass and forcibly sent him into the water.

With a pop, the weight fell into the water.

The cool sea water instantly enveloped his body, Bi Fang opened his eyes, turned on his headlamp, and his vision was full of silver reflections of bubbles.

Bi Fang tightened his waist and abdomen, and the whole person moved up and down like a swimming fish, diving into the water quickly, without even stepping on the duck web.

What is it like to dive and why do you love it?

The answer may be different for everyone.

There are people who love the colorful and different creatures in the sea.

Some people like the feeling of weightlessness under neutral buoyancy.

Some people enjoy drift diving.

Some people like to explore the historical sites of the pitch black seabed

Or is it simply a thrill seeker......

But for Bi Fang, there are vast tracts of land on Earth that can be traveled, and more than 70% of the ocean is something that many people have never set foot in.

Diving gave him a way to explore this new world.

Perhaps, this one answer is enough.

It's quiet underwater.

The only sound that can be heard clearly is perhaps the sound of bubbles exhaled by one's own breath.

At night, there is no direct sunlight, and the flashlight can only shine at a distance of six or seven meters, and the surroundings are dim.

At the bottom of the water, all the senses of the person are reduced, the visibility in the water is very low, the nose is covered by a mask, and it is impossible to speak or hear anything.

The pillar of light swept by, and the tiny whitebait swam away quickly, leaving a blank sparkling water.

Mandy had rarely experienced this, or had never experienced it, like a special forces on a mission, and even after thousands of dives, he still felt an indescribable emotion floating in his heart.

At the same time, what surprised him even more was Bi Fang on the side.

It was obviously dark all around, but the other party seemed to have opened an extra pair of eyes, and even avoided the coral reef that had not yet appeared in the lights in advance!

Mandy was very sure that ten seconds earlier, Bi Fang had avoided the coral reef that had not yet appeared!

Hell yes!

Bi Fang didn't know Mandy's inner thoughts, but he did have an extra pair of "eyes".

The electromagnetic induction of sharks is so fucking easy to use in the sea!

In the 60s of the 20th century, scientists used sensors to mark sharks, and for the first time, humans learned about the speed and location of sharks.

But what surprised scientists the most was undoubtedly that many sharks could find their way precisely in the deep sea.

The reason for this is the shark's magnetic induction.

The shark's head has a tiny protrusion that can sense the slightest change in the underwater electric field.

They will have some small magnetite particles in their bodies, which are very similar to the material of a compass, and can keenly feel the earth's magnetic field.

Since a survival mission in the ocean, Bi Fang has also successfully possessed this ability, of course, it cannot be compared to the shark itself.

But no matter how weakened it is, it cannot be denied that this ability is powerful.

It's just that Bi Fang, who is on land, usually has a hard time feeling the help of shark electrical induction, and can only barely use the water molecules in the air to sense the activities of organisms about half a meter around him.

But in the sea, this function skyrocketed dozens of times in an instant, and Bi Fang was like a radar, which could clearly reflect everything around him in his mind.

The lamppost above his head was completely redundant, and he could feel any situation within ten meters!

There are many small fish living on the coral reefs on the seabed, and with the help of these biomagnetic fields, Bi Fang can easily sense the existence of rock walls and reefs and avoid them in advance.

Such behavior fell into Mandy's eyes......

So you're not Superman, you're a fucking Aquaman!

After sinking more than ten meters, Bi Fang's body felt a little cold.

It may be warm during the day, but now, the water is gradually cooling.

The resistance of the water was great, but it didn't stop Bi Fang and Mandy in the slightest.

Both are good swimmers and divers.

Most people dive underwater for the first time, and this unfamiliar environment and feeling can really make people nervous.

Not only psychological factors, but also physiological reactions.

The world's best divers, such as New Zealander William Trubley, can dive to depths of up to 100 metres in one sitting.

But even at a depth of 10 meters, a person's lungs are compressed to half the size of their normal volume, and at a depth of 100 meters, a person's lungs are the size of two baseballs.

The reason why athletes like Trubry can dive so deep is because humans have an innate ability called the "mammalian diving reflex".

This physiological reflex has a more poetic name, called the "master switch of life".

When a person buries his face in the water, the brain, lungs, heart, and other organs are triggered by various physiological reflexes.

The deeper you dive into the water, the more pronounced these reflexes become, eventually triggering a physiological change.

Blood in the human body will begin to flow from the limbs to the vital organs in the body, and at very deep water, blood can even penetrate through the cell walls of organs to support organs, protecting organs from imploding under strong water pressure.

Moreover, once you enter the water, your heart rate drops dramatically, and even if you exercise vigorously in the water, your heart rate will be slower than when you are on land, which means that you will consume less oxygen in the water and stay in the water longer.

This is the real reason why humans can dive more than 100 meters deep.

It is said that an ancient profession in Ben and other places, "ama", is to dive deeply by turning on the "master switch of life".

Ten meters deep, the first line of photography can be arranged.

Bi Fang opened the bag he was carrying, and after making a gesture to start moving, he threw a rock-shaped camera to Mandy.

The two of them surrounded the rock formation and began the installation.

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