"The smell of blood? Where? ”

Yao Jun shrugged his nose, but he didn't smell anything, the weather was too cold, every breath was like a knife cutting back and forth in his nose, it really smelled of blood, it was also his own blood.

"Is the detector responding?"

Bi Fang adjusted the detector again, but there was no response.

Yao Jun touched his head strangely: "No response, no one nearby, right?" ”

"Maybe the detector was lost, or maybe the other party wasn't prepared, but I did smell blood, very strong."

"But I didn't smell anything." Yao Jun sniffed vigorously, but there was still nothing, "On such a cold day, all the blood is frozen, and the smell can float out?" Dog nose, right? ”

"Don't ask, it's talent to ask." Bi Fang didn't explain much, and with a cautious attitude, he trotted over to the smell in the air.

As he crossed a small slope, Bi Fang keenly retracted his right foot and stopped Yao Jun and Jarrett behind him.

"Be careful, there are glaciers."

As he spoke, he stretched out his trekking pole and poked it on the snowdrift in front of him, and under the weak force, the snow slope quickly collapsed, splashing countless white smoke and dust, and under the sun, a bottomless deep blue glacier appeared in front of everyone.

The audience was stunned, only looking at the snow slope in front of Bi Fang, and there was no sign of it.

Without any warning, how the fuck did Fang Shen see it?

[Damn, how the did you find out?] 】

[X-ray, Fang Shen used X-ray! ] 】

[What the hell is an X-ray, did I walk into the science fiction channel? ] Is this in the river? 】

[New fans don't know, the old side is my country's secret weapon, it has undergone physical transformation, its eyes can shoot X-rays, and it is easy to see through, there is a verbal agreement within our army, the enemy does not use nuclear weapons, and we do not use Fang Shen! 】

[The matter of the ultimate weapon, can't you hide it anymore? ] 】

"Of course you can't see the pile of snow in front of you, but you take a long-term view."

Hearing Bi Fang's words, the photographer in the base camp immediately controlled the drone to fly high and photographed the hillside.

On the slope, another scar-like snow line is slightly raised, leaving a slight shadow in the sunlight, although it is shallow, but once the line of sight is widened, it becomes conspicuous.

"Glaciers covered by snow are very difficult to find, and many people are buried because of such glaciers every year, but a wider field of view can form a more comprehensive understanding, and you should be vigilant when you have such a streamlined snow line in front of you, in addition to the snow line, you can also judge by color."

Bi Fang grabbed a handful of snow from the edge of the crack, took a few steps back, and placed it on the ground.

The audience's eyes widened, and after careful comparison, they slowly found that it seemed that the snow at the edge of the crack was darker?

[Is the snow at the edge of the crack darker?] Is this a delusion? 】

"It's not an illusion, this kind of glacier crack covered by snow is called a dark crack, except that it is slightly lower than the surrounding line, and you can observe the shadow lines through the sky during the day, it is distinguished by the color of the snow, and the color of the snow on the dark crack will be slightly yellow or black."

"Is it so amazing? How does it work? Yao Jun listened with relish, grabbed a handful of snow and licked it.

It doesn't feel like a difference, huh?

The same ice teeth.

Bi Fang smiled: "Guess what? ”

"If I could have known, I wouldn't have been following your ass."

"It's the specific heat capacity." Bi Fang patted the snow in his hand, "Under the crack is air that cannot be circulated, the specific heat capacity is larger than that of rock, and the temperature difference causes the ice crystal rate and density of snow to be different, and the refractive index changes and the color becomes darker." ”

what？

The audience was dumbfounded.

[I have thought that Bi Fang knows a lot, but I didn't expect to underestimate him. 】

[Than the heat capacity, I, I can't think of the reason for it for the rest of my life.] 】

[Is this the big guy, trembling]

Bifang walked along the crevasses of the glacier, trying to find out if there were any remnants of the Sherpa aluminum ladder.

"The depth of glacier fissures is generally 25-30 meters. This is significantly deeper, and the ice above this depth is stronger, and the further down it goes, the larger the ice crystals will be, and the stronger the adhesion will become. When subjected to pressure to try to separate it, its internal structure becomes tighter due to the pressure, and it looks like thick cream or syrup. ”

"Actually, the best way to cross the glacier is to go around it, and it is much safer to go around in a circle than to cross it, and the next best thing is to choose a snow bridge. Deep snow in winter hardens under strong winds, threatening to form snow bridges over ice crevasses that do not melt until summer. There is also a more solid snow bridge, but it is not a snow bridge anymore, it is a slender isthmus connecting two ice crevasses. ”

What is the isthmus? 】

[It's a narrow land that connects two continents, like the Panacow Isthmus between the South American continent and the North American continent, that's a typical isthmus, but the isthmus connecting ice crevasses is relatively rare, at least I haven't seen it much]

[Brother bullfrog, what are you doing? 】

[Geological prospector, when I got up in the morning, my colleague told me that there was a cow who broadcast an avalanche live, and also carried out textbook self-rescue, I felt curious and came to see, the anchor is really powerful, although I haven't watched it for a long time, but it is very professional, and I don't know some knowledge. 】

Lao Deng stroked his glasses and typed this paragraph on the computer.

The snow on the dark crevices of the glacier will be darker, the reason is because of the specific heat capacity, although he has not been working for long, and the main direction of attack is not glaciers, but he also knows more about this than ordinary people, this knowledge really opened his eyes, and he has the urge to fly to Mount Everest to study glaciers now.

"This phenomenon is not something that can be discovered by simple research and investigation, but requires a lot of experience accumulation, where did this guy come from?"

[Everyone is really watching the live broadcast, a big guy hacker came out yesterday, and a geological prospector came today]

[Didn't there be a professor of biology and history before (dog head)]

["Thriving"! 】

Unfortunately, Bifang did not find the aluminum bridge left by the Sherpas, only the nail hole left next to the glacier, which was probably washed away by the avalanche last night.

But fortunately, the snow bridge was found by Bi Fang.

It's wide and thick, and it looks like a road has been built.

"When you come across a snow bridge, look carefully from the side before stepping on. The pit must not be thin, and then try to walk up to the field to detect, be careful, and let the team members to ensure that the posture tightens the rope to prevent the snow bridge from breaking suddenly and falling into the crack. After the first team member passes, the other team members can tighten the rope and follow the leader's footsteps strictly. ”

"The robustness of the snow bridge is mainly influenced by the temperature. In the cold winter or early morning, the snow bridge may be enough to support a truck, but when the snow melts in the afternoon, it may not even be able to support its own weight. Every time you cross the snow bridge, you must be vigilant, and if you pass safely in the morning, it does not prove that you can pass safely in the afternoon. ”

"Tightened." Bi Fang turned to Yao Jun and Jarrett to the two.

The two nodded, lowering their center of gravity at the same time, and the crampons were embedded in the ice.

Bi Fang took a deep breath, and was about to step out, a few meters away on the edge of the glacier, a bloody hand pressed on the ice, and the blood quickly condensed into a bloody handprint, growing sharp ice crystals.

Bi Fang's pupils contracted suddenly.

"Hurry up and save someone!"