Yes!

Standing on the outskirts of the jungle is a canine!

It is supposed to be a soil dog, accustomed to living in the wild for 4,700 years, and no one dares to guarantee what the docile earth dog will do when it meets humans.

The size of this dog is a little large, the whole is yellowish gray, its expression does not have a trace of emotion, and it stares at Zhao Yunxiang with dark eyes.

The dog did not wag its tail, which indicates that it was not happy, and there may be no fragments of memories of flattery to humans in the dog's memory.

"This dog ......" Zhao Yunxiang frowned and got up, took the bow and arrow, if this dog had any vision, he would release the arrow as soon as possible.

The domestication of dogs dates back to 7,000 years ago, when primitive people began to try to domesticate some docile wolves, and after the wolves were domesticated, they became the current dogs.

However, the scorched wolf, gray wolf, and snow wolf are not the direct ancestors of dogs, but the ancestors of dogs do not exist now, and their disappearance may have something to do with primitive people.

The memory of domestication has always been engraved in the memory of dogs, they like to listen to human "tsk" sounds, afraid of human bending movements, everything about them is bound by humans.

One day 4,700 years ago, most of the dogs were liberated, and those who broke free from their chains and cages plunged into this mutated world.

Perhaps, when humans were petrified, dogs survived through supermarkets, or it was possible that they were directly involved in nature.

After all, dogs are omnivores, basically eat everything, including animals and their own feces, in general, dogs' vitality and survival ability are much stronger than people.

"Damn!" Han Xuening seems to be very familiar with dogs after 4,700 years, even if they are pets, after 4,700 years of wild life, they will become beasts!

"This creature should be careful, its combat effectiveness is not strong, but it can transmit terrible diseases!" Han Xue Ning held the spear, "A certain warrior in our clan was bitten by it, and it didn't take long for him to die, and his death was tragic. ”

"Rabies?" Zhao Yunxiang can guess only this, this is a terrible virus that can kill people, if you don't get vaccinated in time according to your weight, once infected, there will be no luck.

What the two don't know, of course, is that some dogs are not only infected with the rabies virus, but they are also good at using their sense of smell, and even buried corpses are dug up by most wild animals.

The dog finally left, and Zhao Yunxiang looked at the dog's figure and fell into deep thought.

If placed on the original earth, he is not too far away from time, generally speaking, he will crouch down and stretch out his hand, trying to communicate with the same height as a dog.

In this way, most dogs will come over with their tails wagging, and generally speaking, as long as they do not bare their teeth and do not hold their tails, they can be comforted at will.

However, this one is different, it has forgotten the memory of being domesticated, it has returned to the primitive, and in the memory inheritance of the dog, there is no owner.

"Sure enough, time makes everything very thin. Zhao Yunxiang continued to look into the depths of the jungle and watched the dog disappear from view.

On this day, Zhao Yunxiang saw a creature he was familiar with.

The domestic pig has become a very aggressive flower pig, with a physique and personality somewhat similar to the wild boar, and the cat last night, who is not very aggressive, is good at climbing trees and stealing things.

And today's dog, which walks on a lonely path, is unruly, and will never trust other creatures easily.

......

The sun is very big, the heat wave in the air is getting thicker, and the temperature is getting a little higher now, about 35 degrees Celsius.

Zhao Yunxiang and Han Xuening walked barefoot on the narrow coastline, and the two of them took a walk when they had nothing to do, looking for something useful by the way.

There is a lot of driftwood on the coastline, and then there are some shells and the like.

"There are almost no tribesmen coming here, so there should be a lot of coconuts. Han Xuening seems to like drinking coconut water very much, and so does Zhao Yunxiang.

Yesterday's coconut was snatched from a group of cannibal tribesmen, but unfortunately, there was only that one.

There are relatively few coconut trees standing by the sea, only a few of them, and even fewer have coconuts.

Zhao Yunxiang prefers the stones on the ground to the coconuts on the trees, and there will always be some inadvertent discoveries in the sand by the sea.

When the sea hits the beach, some stones will be revealed, and Zhao Yunxiang accidentally found a light orange translucent stone.

"Calcite, a calcium carbonate mineral, is the stone used to make microscope lenses. Zhao Yunxiang raised a fist-sized calcite stone, which was tested by the sun and showed that the stone was very transparent.

"Calcite??" Han Xuening pointed to the stone in Zhao Yunxiang's hand, tilted her head slightly and said, "This is this stone that looks beautiful?"

"This is not an ordinary stone, it is calcite, mostly born in limestone rock formations, this stone is soaked in hot springs, can be deposited travertine, is an edible calcium carbonate, and its powder can be collected to make Western medicine, the main treatment of lung fever!"

Zhao Yunxiang continued, "The general color of calcite is white or colorless, and this light yellow calcite may contain iron and manganese!

Iron and manganese have many functions, such as electric welding, mining, crushing stone, and it is also used to make dry batteries.

Moreover, manganese metal can also increase the hardness of iron without reducing the toughness, but the method of refining iron manganese is somewhat difficult.

"......" Han Xuening didn't say a word, she didn't understand what Zhao Yunxiang said at all, she just nodded vigorously.

"Calcite, ferromanganese, microscope...... What are these things!!"

The crazy Han Xuening just tilted her head and found the coconut on the coconut tree.

"It's coconut ......"

The girl was a little excited, and hurriedly ran to the coconut tree to pick coconuts.

"It's so hard to find some coconuts by the beach these days. Zhao Yunxiang looked at the few coconuts on the tree, and felt a little bitter in his heart.

The two of them came to the coconut tree, the world of shade and the sun and the earth were like heaven and purgatory, and when they looked up, the sunlight above their heads was cut into many pieces by the leaves of the coconut tree, and it was very beautiful to shine.

The coconut tree is 7 meters above the ground, and there are many driftwood trees on the seaside, and the driftwood is connected to the spear, and it is easy to cut the stem of the coconut with the sharpness of the spear.

After picking the only 4 remaining coconuts from the coconut tree, the two returned to the shelter together, and of course they came to enjoy the sweet coconut water and the sea view on this hot day.

Along the way, no useful stones were found again, and there were only busy small crabs chasing the waves by the sea.

Back to the shelter......

It was discovered that Simba had returned.

Something wasn't quite right with the lion, it had a scratch on its head, and it seemed that it had encountered something in the woods.

"Simba, come here, ......" Zhao Yunxiang looked at the huge lion and immediately called, his eyes narrowed slightly, and he wanted to know who did it.