Walking back to the campfire, the ore still hadn't cooled down, Wang Yang was quite unhappy with the scalding, picked up the ore and threw it on the ground.

"What's that?"

"Bang!" The gray side of the ore came into contact with the stones on the ground, shattering in an instant, splashing dust on the ground.

"Dusty!" Wang Yang's eyes widened, he thought it was very interesting, swept the little white ash into a small bag and put it up, and then fell asleep.

Early the next morning, everyone got up early, and the chasers pushed Wang Yang's body and told him to get up and go on the road.

Wang Yang opened his eyes in a daze, came to the stream and splashed water on his face, sobered up for a while, and then, as usual, packed up his weapons and equipment, and planned to leave.

He held the wooden spear, and suddenly felt a little pain in his fingers, and looked at it suspiciously, and found that the place where he had been burned yesterday was a little painful. Remembering that I put away some white ash yesterday, I couldn't help but open the bag and pour it into the palm of my hand to look at it.

"Huh?" Wang Yang was a little dumbfounded, and the powder actually changed color again, from white gray to light blue gray.

"What's the situation?" Wang Yang touched the dust, and was a little speechless, the dust was not as soft as yesterday, but as hard as sand, and could not be crushed again.

At this time, Wang Yang didn't plan to continue the migration, he called everyone to stop, and everyone gathered around to look at the blue ash in his hand, not understanding what it meant.

"Make a fire, make a fire!" Wang Yang shouted at everyone, feeling a little excited, and he had some guesses about what the blue ash in his hand was.

Then the people stopped, and a fire was kindled.

He carefully retrieved the previous piece of ore and smashed a small groove in the ore with goosestone. Pour the blue ash into the groove and place it in the fire.

It didn't take long to see it. That pile of blue-ash turned into white powder in the flames, and over time. The ash is melting!

That's right! They are indeed melting! It turned into liquid silver again, shining with fire.

Not only that, but more liquid flowed out of that piece of ore, shimmering with light.

Wang Yang carefully picked out the ore, then took it with the animal skin, poured the silver juice into the wooden bowl, and waited slowly.

Time passed quickly, and in a short time, the juices solidified together. It turned into a white piece again.

Wang Yang had some experience at this time, and he knew that the road was very hot, so he didn't dare to touch it, and continued to wait.

Everyone looked a little inexplicable, what is Wang Yang doing? But they also found that the juices that would curdle seemed interesting.

I waited for a long, long, long time, until noon that day, the white lumps in the barrel had not been able to cool down, and it was estimated that the heat in it had not cooled down.

Wang Yang is not in a hurry. Wait quietly.

That night, the white patches finally changed again, and the surface began to slowly turn pale blue, and the surface formed a faint blue film. Appears smooth and translucent.

Wang Yang touched it gently, and there was still a little heat on it, so he knocked it gently. The blue lump came loose and fell into his hand.

He squeezed it hard. It's hard and can't be pinched. So he slammed it on the ground, "Smack! There was no reaction, it didn't crumble into powder, he took another goose stone and knocked it up, and the blue stone was still not broken, but a groove appeared.

It's hard to imagine that something has such a big physical change that when it's white, it shatters, and when it turns blue, it hardens.

And this substance, the blue stone in front of you, is called tin, which is the fifth metal after gold, silver, copper, and iron!

This is why Wang Yang spent a whole day staying, not migrating.

All metal substances, as long as they are discovered, no matter what they are and how useful they are, are worth stopping and observing by Wang Yang.

"Finally found metal, what do I say, changing the territory is rewarding." Wang Yang held it tightly in his hand as if he had seen a banknote, and his eyes lit up.

Needless to say, the emergence of metallic substances is the most useful substance to break through the current stagnation in the development of the tribe.

A piece of metal can completely change the world.

In fact, the rapid rise and growth of human beings and the development of populous tribes are due to the use of metal.

And tin, if nothing else, should be the earliest metal discovered by man.

Why? This is because the melting point of tin is extremely low, whether it is gold, silver, copper or iron, their melting points are around 1,000 degrees, and early humans could hardly process it except for finding existing finished products.

Tin is an anomaly, it is a metal, but it has a very low melting point, only 230 degrees, and can be easily refined.

And because its melting point is too low, you can change its shape at will, as long as you make a template, pour in tin juice, and cool it, it is a thorough tool.

Do you want to make a tin spear? OK! Want to make a dog whack? OK! Want to make the Blue Dragon Glaive? Nonsense, of course you can!

It has an extremely low melting point, and it has become a metal that can be fabricated casually by humans in the early days.

But why is it so easy to use, why is it not as famous as gold, silver, copper and iron in later generations?

Naturally, because it has a fatal flaw, soft.

Good moldability means that it is too soft, just like Wang Yang just did, just take a goose soft stone and smash it, and it will smash out a groove.

is not as hard as a stone, and there is an inherent disadvantage in battle.

Food is the root of everything, and Paleolithic humans, including Neolithic humans, were fighting for survival, and they needed hard weapons, not a mass of plasticine.

Therefore, the use of tin is generally used as a tool to facilitate people's lives, such as making pewter, making pots, cups, boxes, etc.

It is indeed a bit difficult to use it as a weapon.

And tin also has a big fatal flaw, that is, its instability.

As a piece of metal, stability is an important indicator to measure the value of the metal, its melting point is too low, which means that it can not stand high temperatures, and there are great limitations in application, and when the temperature reaches more than 100 degrees, it is already fragile, and it will break into powder at a light touch.

Not only can it not stand the high temperature, but also the low temperature, when the temperature drops to more than 30 degrees below zero, it will also turn into powder, which is an interesting metal that is not resistant to severe cold and heat.

In the age of the Ice Age, more than 30 degrees below zero was not just like playing, and how to preserve tin was a big problem.

Of course, tin also has a glorious history.

That's what made it famous for its Bronze Age.

When it is smelted with copper, it can be combined with some other combinations to make brass and bronze, and because of the addition of tin, the melting point of copper is also reduced, which provides a strong foundation for the early development of the kiln industry.

And with the advent of bronze, mankind no longer had an opponent and began a civil war.

So Wang Yang's goal now is to refine a lot of tin, and then find the damn copper, refine the bronze, and sweep the Quartet! (To be continued......)

PS: Huh~ I'm so tired in three chapters today, it's still the old saying, kneel and beg for everything!