Although Zhao Qian had many doubts in his heart, he did not delve into it further. He was mainly worried about encountering the group of wild boars again, so he stayed for a while and left the forest.
As for the water source of this lake, when there is really no fresh water in the future, he can come here to replenish it, but he has no plans to move here.
The fundamental reason is that the forest around the lake is unsafe and there may be dangerous wild animals. He doesn't want to experience what happened yesterday again.
However, not long after Zhao Qian left the forest, a huge ripple suddenly appeared on the originally calm lake surface.
The ripples continued to spread outward, and in a short time, they covered a large area of the lake.
At this moment, if there is a lens looking down from a high altitude, you will see a huge shadow swimming slowly across the lake, and finally the shadow slowly disappears.
…
After Zhao Qian left the forest, he did not return to the camp, but explored the distant peaks.
The problem of water sources has been solved for the time being, so the next step is to find materials for making stone tools.
Ordinary rocks cannot be used to make stone tools. Stones suitable for making stone tools must have high hardness but brittle properties, such as obsidian, flint, quartzite...
He didn't know much about these stones, and he didn't know what geographical environment would produce such stones, so he simply went to the mountain peak to have a look.
There will never be a shortage of rocks on the mountain!
The mountain peak that Zhao Qian wanted to go to looked not far away, but in fact it took several hours to reach the foot of the mountain peak.
The mountain peak towers into the clouds. Looking from below, you can only see the mountainside, because the view further up will be blocked by clouds, which shows how high the mountain is.
"The hardness of the stone here is okay, but I'm not sure whether it's suitable for making stone tools."
Zhao Qian picked up some stones at the foot of the mountain and tested the hardness. He was still very satisfied with the hardness.
However, whether these stones can be used to make stone tools depends on whether other aspects meet the standards. He does not want to chop down a tree and have to buy dozens of stone axes.
"Well, it would be nice to have a military shovel, but if that doesn't work, it would be nice to have a dagger." Zhao Qian suddenly sighed, and then added: "Although it's not clear whether these stones can be used to make stone tools, it can be used to make stone tools."
Making a hammer shouldn't be a big problem."
Ever since he was chased by a herd of wild boars, he desperately wanted to get himself a weapon for self-defense. Even if it was useless against wild boars, it would give him some peace of mind.
Thinking of this, he found a piece of wood that was thinner than his wrist and a sharp stone, and made a 'cross' shape on the top of the wood.
Then, he selected a stone that met the standard from many stones, put it into the "cross" gap, and finally fixed it with cloth strips.
After the fixation is completed, an unattractive stone hammer is produced.
Zhao Qian swung it a few times and felt that it felt pretty good and could be used as a weapon.
"I don't know if this hammer can repel the wild boar?"
Zhao Qian was frightened by wild boars, so his main imaginary enemy for making stone tools was those wild boars.
Of course, he still knew himself. Even if he had a stone hammer, he could only repel wild boars at most, but could not kill those wild boars with rough skin and thick flesh.
"Keep exploring!"
Zhao Qian put away the stone hammer and said.
at the same time……
In the camp, Liu Yun braved the scorching sun and walked up and down the beach with a piece of cloth in her hand.
Wang Qianqian came back from looking for materials to weave fishing tools. Seeing Liu Yun like this, she quickly stepped forward and pulled her to the shade.
"Xiaoyun, are you sunburning in the sun on a hot day? Ultraviolet rays are so strong that they will accelerate skin aging."
"I put on coconut oil!"
Liu Yun smiled slightly at Wang Qianqian, and then took back the cloth.
At this time, Wang Qianqian discovered that there was something tied to the end of the cloth strip, which was covered with densely packed, very tiny black particles.
"Xiaoyun, what are these?"
Wang Qianqian saw Liu Yun collecting the black particles with a puzzled expression on her face.
"Fe3O4." Liu Yun explained.
"What is ferric oxide?" Wang Qianqian asked again.
"Iron compounds can be refined into iron through displacement reactions." Liu Yun explained again.
"Oh my god, you're not going to make iron, are you?" Wang Qianqian asked in surprise.
"Um!"
Liu Yun did not hide it from Wang Qianqian and said: "Zhao Qian encountered a wild boar yesterday, which shows that this island is not safe. Just in case, I will try to see if I can practice iron."
In fact, she didn't have such an idea at first. It was Zhao Qian's encounter with a wild boar that gave her a warning and made her realize that she must have weapons.
On such a deserted island, due to limited conditions, the preferred weapon is stone tools.
However, in her heart, she always wanted to make iron tools.
Compared with stone tools, iron tools are crushed in every aspect.
However, making iron is not easy. At the very least, it requires iron ore or iron-containing substances, which she does not have.
Fortunately, she thought of other ways.
"Xiaoyun, you are so amazing." After Wang Qianqian finished speaking, she looked at the magnets tied to the cloth and asked, "Where did these magnets come from?"
"Removed from the suitcase."
Liu Yun pointed to the suitcases collected by Zhao Qian and said: "Each suitcase contains some magnets. If you gather a few, you will have so many. Then use the magnets to suck out the iron tetroxide in the sand. It will be very easy
The iron sand collected soon will be enough to refine a weapon."
Wang Qianqian didn't realize it, and said with emotion: "Xiaoyun, I suddenly feel that you are overqualified to be my assistant. Compared with you, I can't do anything."
Liu Yun smiled and said: "People's talents are different. I can only learn, but your talent is acting. You don't need to compare with me."
Wang Qianqian pouted and said: "But many people on the Internet scolded me for my lack of acting skills."
Liu Yun said with a serious expression: "Please write down their IDs. When you go back, I will sue them for defamation."
"Hate!"
Wang Qianqian finally smiled and felt much better.
Liu Yun said: "You can rest, I will collect iron sand again."
"Don't go there, it's not good for your skin."
Wang Qianqian stopped Liu Yun, her eyes suddenly noticed the coconut crab, and she grinned: "Xiaoyun, I have a way to collect iron sand and prevent you from being exposed to the sun."
"any solution?"
Liu Yun asked curiously.
Wang Qianqian did not answer Liu Yun's words, but snatched the cloth strip from Liu Yun's hand and came to the coconut crab.
"Coconut Crab, I, Wang Qianqian, am the most loyal person. I promised to let you go before, but now I will let you go." Wang Qianqian said: "However, whether you are a human being or a crab, you must be grateful. I will let you go now."