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Back in 1950, the Italian physicist Enrico Fermi spoke on the nine elementary particles known by then that "this is already a sufficiently large number to cause suspicion of the elementality of even some of them". And in the experiments there appeared more and more elementary particles. Why did nature need so many "simplest bricks" of matter and how to organize this set, bring it into the system?..

The recent appearance of energy generators capable of extracting energy allegedly from the "ether" raises a lot of questions. For example, how is this possible and what is the physics of these processes? They say that the main role is played by the energy of the vacuum. And, in fact, how is the space in the atom filled between the nucleus and electrons filled? Nothing, nothing?..

To date, such an element as manganese in steel and in alloys is used very widely, we can even say that it is a metal that is constantly used in the production of steel. And although the ore, which was called manganese, has been used by man since the 13th century, but this metal was discovered only in 1774. This discovery was made by the Swedish scientist K.-V. Scheele. But before the industrial application of manganese it was necessary to wait another hundred years...

Many devices and devices for the demonstration of one or another of the physical phenomena and laws are named after the geographical places where they were developed or where they were used. Today we want to introduce one of these devices. This is a Cartesian diver - an instrument for studying the conditions of sailing bodies and demonstrating the law of Archimedes...

Movement of the body - what could be easier? But what is the physical meaning of the word "moves"? It seems that everything is obvious - the body at a certain point in time is in one place and the same moment of time leaves this place and is transferred to another. Are not the paradoxes of movement hidden in such an explanation?..

Among the paintings of the London period of the famous French Impressionist Claude Monet, one of the series of paintings "The Parliament Building" written at the beginning of the last century is striking and particularly surprising. It depicts a red mist through which the Sun shines weakly, and the houses in the distance seem to be ghosts...