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Why do wrinkles form? Detailed answer

Big encyclopedia for children and adults

Directory / Big encyclopedia. Questions for quiz and self-education

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Why do wrinkles form?

Already in the second decade of life, facial skin begins to dehydrate; less and less intercellular water remains in it, making the skin elastic. It is not noticeable at first, but over time, dry skin forms lines and wrinkles, the number and depth of which can be reduced with proper face and body care.

Author: Mendeleev V.A.

 Random interesting fact from the Great Encyclopedia:

What are Saint Elmo's fires?

"St. Elmo's fire" is one of the many interesting phenomena associated with lightning, and in order to understand it, we must remember what happens when lightning flashes.

It's all about the presence of two types of particles - positive and negative. These two types of particles are strongly attracted to each other, and if they are separated, they will tend to combine again. When a strong negative or positive charge is created in the cloud, it causes an opposite charge down on the ground. Electrons begin to move from the area of ​​negative charge to the area of ​​positive charge. They gradually form a channel or channels of charged particles between the ground and the cloud, and when a large wave of electrons is formed, a flash of lightning occurs.

Now suppose that instead of letting the charges build up until the voltage gets too high and has to be discharged, there would be another way to help the charges from below, from the ground, seep to the top. Instead of a lightning discharge, the charge would leak out in the form of a "brush discharge". That's exactly how the lightning rod works, by the way. The top of the lightning rod helps the electrons leak out.

"St. Elmo's fire" is the glow that accompanies a similar "brush discharge" of atmospheric electricity. It appears as a twinkle at the end of spiky objects such as church bell towers or ship masts, and appears here most often during a storm. We usually hear crackling or hissing.

Another place where "St. Elmo's fire" is often seen is on propeller blades, and on wingtips, windshields, and on the nose of aircraft when they are flying in dry snowy weather or close to where a thunderstorm is. This electrical charge can sometimes be so strong that it causes electrostatic phenomena in the aircraft's radio.

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Random news from the Archive

First linen fabric 20.06.2010

The first clothing of an ancient man about 70 thousand years ago was, as far as is known, the skins of animals. Later, people learned to use plant fibers to make clothes.

Recently, archaeologists have found the remains of flax fibers from the Paleolithic era in a cave in western Georgia. Some of them are painted with natural pigments in black, pink and turquoise. If the fibers were dyed due to physical and chemical processes in the soil, their colors would be the same, so this is clearly the result of the activities of the ancient textile workers.

Linen dyeing is quite a complex process, and it is surprising that Paleolithic people mastered it. Radiocarbon dating showed the age of this flax - about 36 thousand years.

Around that time, the first aliens from Africa appeared in Europe, where modern man was born. Apparently, the cool climate of Europe forced them to take care of making clothes.

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