Man began to invent the wheel about 20 thousand years ago. It was something like this.

Once an ancient man decided to hollow out a boat from a tree trunk ‚to sail to new lands. Just how to drag this tree to the river? You can chop the knots so as not to cling! - suggested tribesmen, chopped off! Carried! ..

And so dragged for several hundred years. Until the smartest one shouted: “Guys! It’s easier to drag when the boat glides over fallen tree trunks. ”So the ancestor of the wheel appeared - a simple log! This wheeled great-grandfather was used by the ancient Egyptians to build their pyramids. And then people invented a miraculous wagon. A wooden platform, and under it several logs. Ride on it wasn’t easy - the logs all the time “ran up”, and their center rubbed against the platform! But the ends of the trunks sticking out from under the wagon remained thick. “Well and good!” thought the ancient people. “So the wagon rolls faster.” They decided yourself about igat middle log.

And then they thought of taking a thin stick - the axis - and putting on it round wheels - wheels! And finally, 5 thousand years ago in Mesopotamia, a man first climbed into a two-wheeled cart!

The first wheels were wooden with a hole in the middle. “So we will translate all the trees!” - people noticed and thought for about 2 thousand years. And then in Egypt they invented a four-spoke wheel. A thousand years later, an eight-spoke wheel appeared in Greece. He was lined with leather, and the rim was lined with iron nails. Soon, the rim began to be made of iron. How a bird drove a wagon on such wheels!

But people did not stop there. And they still invent wheels for moon rovers, cars and robots.

Статья Wheel написана для наших любимых читателей Alisgame.com!

Molly, limping, entered the room.

- What happened to you? Tonti jumped to her.

- I hurt my leg,-  Molly complained. - Do you know everything, tell me how you can treat it?

- Put a plantain, it always helps from wounds.

- Plantain hasn't grown yet,- Molly sighed.

- Do you know that in ancient times, soldiers were treated with silver?

- Silver? Like this?

- They put silver plates on the battle wounds - and everything quickly healed.

- Wow! And I thought that only coins and jewelry are made of silver!

- What are you! Silver is a very useful metal! For example, it is used to purify water. It perfectly destroys harmful bacteria. The astronauts in flight drink only "silver" water. And in Russia, silver coins were thrown into the well so that the water was clean and tasty. Particles of silver are in some mirrors. In order to take a photo, you also need silver! Yes there! In his honor, even a whole country was named - Argentina!

- You're talking nonsense, Tonti! - The word silver and Argentina are completely different from each other!

- And here they are! The Latin name for silver is argentum, which means white, radiant. True, the largest silver reserves are not at all in Argentina, but in Mexico and Peru,

- And how is it mined?

- Previously, silver was found in the form of nuggets, large silver ingots, but now it is necessary to melt it from ores and clean it of other metals. The largest silver nugget was found in Chile and weighed one and a half tons. Two big horses weigh the same amount! How, by the way, is your leg? Does not hurt?

- Nope. Almost healed! But if I applied silver, I would heal even faster, right?

Статья Silver написана для наших любимых читателей Alisgame.com!

Once in the main workshop of a huge and very secret plant, a new rocket appeared with the strange name Prototype

Strongman Proton, lifting heavy satellites into space, began to show the newcomer the plant.

- As we, rockets, were born, you probably already know ...

- Aha! At first, in ancient China, flying tubes with gunpowder were invented: for salutes and to scare enemies. Well, the modern large missiles were invented by the brilliant Russian scientist Konstantin Tsiolkovsky.

- Exactly! Thanks to his bold imagination, we flew into space! Here, by the way, is the most famous space rocket. - Proton pointed forward

- Nice to meet you, I'm East!

On the same rocket, Yuri Gagarin was the first to see the Earth from space!

And my grandchildren - they are called their Unions - are still delivering astronauts into orbit. Then a bass was heard from the corner:

- Well, they call me Voivod. “I am the most powerful military missile in the world, by the way,” Voevoda added in a whisper, “with a nuclear charge. While my friends are on alert, no one mother Russia dare threaten!

The prototype looked respectfully at the Voivode and timidly said:

- For the time being, I am helping our scientists study the atmosphere.” But they promise that I will grow up soon, become big, big, and the first to fly to the farthest stars! I wonder what rockets live there?

Статья Rockets написана для наших любимых читателей Alisgame.com!