Science

Different countries have adopted different measures of volume and weight, and often they look rather unusual for a Russian person, because we do not encounter them daily. One such unit of weight is the bushel. Where it is used and how much it is - a bushel - in terms of the usual system of measures, you can find out from this article. Last modified: 2025-01-23 12:01

At first glance, it may seem that in nature, each species lives in isolation. But in fact, this is not at all the case. All living organisms are in close interaction with each other and elements of inanimate nature. Commensalism is one such relationship. We will consider its main characteristics in our article. Last modified: 2025-01-23 12:01

From our article you will learn what chlorophyll is. It is this substance that determines the green color of plants and is a necessary condition for the synthesis of carbohydrates, and therefore their nutrition. Last modified: 2025-01-23 12:01

The shoot of plants consists of parts that are functionally interconnected, can be modified depending on environmental conditions and give each plant its own unique look. Last modified: 2025-01-23 12:01

Saliva is a clear, colorless liquid. This is the secret of the salivary glands, separated into the oral cavity. It provides taste perception, promotes articulation, lubricates chewed food. Last modified: 2025-01-23 12:01

Ferromagnetic material has special properties and differs significantly from paramagnets and diamagnets. For example, these substances have high magnetic permeability and are capable of amplifying external magnetic fields by several hundred thousand times. Last modified: 2025-01-23 12:01

In the 20th century, G alton's name was mostly associated with eugenics, which is often seen as an expression of class prejudice. However, such a vision of eugenics distorts his thought, since the goal was not to create an aristocratic elite, but a population consisting entirely of the best men and women. Last modified: 2025-01-23 12:01

The article tells about when such a chemical element as uranium was discovered, and in which industries this substance is currently used. Last modified: 2025-01-23 12:01

Space agencies announce the possibility of manned flight to the Moon and Mars in the not too distant future, and the media instill fear in the minds of the townsfolk with articles about cosmic rays, magnetic storms and solar wind. Let's try to understand the concepts of nuclear physics and assess the dangers. Last modified: 2025-01-23 12:01

Today, only a completely ignorant person does not talk about new, powerful quantum computers that threaten all modern methods of data encryption. What is quantum communication, what will the launch of a quantum communication satellite lead to?. Last modified: 2025-01-23 12:01

The course of development of civilization is based on a logical understanding of the world around us. An event that occurs, but does not find a clear logical explanation, is called a paradox. This article describes some of the well-known paradoxes faced by modern humanity. Last modified: 2025-01-23 12:01

It is difficult to find a person who would not dream of mysterious, mysterious magic. If you are going to not just dream, but partially touch and realize that the world of magic really exists, then this article is dedicated to you. Let's take the first step together into the world of quantum physics - the world of miracles and magic. Last modified: 2025-01-23 12:01

Russian Research Center (RNC) "Kurchatov Institute" is a leading domestic research institution in the field of nuclear energy. In the Soviet Union it was known as the Institute of Atomic Energy. Named after nuclear scientist Igor Kurchatov. Last modified: 2025-01-23 12:01

How does the brain control voluntary and involuntary movement? What are the neurological abnormalities associated with damage to the pyramidal system of the brain? If conduction is disrupted in some part of the nerve circuit, the muscles in some parts of the body will not be able to receive signals. This will cause paralysis. Paralysis is divided into 2 types: central and peripheral. Last modified: 2025-01-23 12:01

What is a nerve impulse? How and where does it occur? How does it pass through our body and at what speed does it do it?. Last modified: 2025-01-23 12:01

The human brain is made up of white and gray matter. The first is everything that is filled between the gray matter on the cortex and the basal ganglia. On the surface there is a uniform layer of gray matter with nerve cells, the thickness of which is up to four and a half millimeters. Last modified: 2025-01-23 12:01

The cell is the elementary unit of living organisms on Earth and has a complex chemical organization of structures called organelles. These include the nucleolus, the structure and functions of which we will study in this article. Last modified: 2025-01-23 12:01

Coming from a simple, working-class family, he became a world-famous physiologist, bringing priority to Soviet science in many branches of neurophysiology, while being periodically harassed for his unwillingness to follow an officially approved, ideologically verified course in science. Last modified: 2025-01-23 12:01

Here the reader will find information about the structure of the human throat, its constituent elements and functions. In addition to the throat, we will consider what the nasopharynx, oropharynx and larynx are. Let's get acquainted with the features of the anatomical structure of these structures. Last modified: 2025-01-23 12:01

It is very easy to get confused in the cycle of life events. Children are taught to distribute their time correctly by adults, who often put everything off until later. As a rule, this “later” never comes. Last modified: 2025-01-23 12:01

With any measurements, rounding off the results of calculations, performing rather complex calculations, this or that deviation inevitably arises. To assess such inaccuracy, it is customary to use two indicators - these are absolute and relative errors. Last modified: 2025-06-01 07:06

In sociology, a non-continuous study, or a selective method, is most often used. Its results can be extended to a large set of people, which is called the general. Last modified: 2025-06-01 07:06

The armillary sphere is a unique device that makes it possible to track the coordinates and movement of celestial bodies. It was created before our era and remained relevant until the 20th century. Last modified: 2025-01-23 12:01

The World Meteorological Organization was formed on the basis of the International Meteorological Organization (IMO). Today it is the official voice of the UN in the problems of the Earth's atmospheric phenomena, the relationship of the atmospheric layer with the oceans and the impact on climate change. Last modified: 2025-01-23 12:01

Understanding different types of climate is for everyone who wants to consider himself a true connoisseur of geography. Last modified: 2025-01-23 12:01

In Russian culture, there are many common surnames in the modern world, one of which is Fedorov. The origin and meaning of the surname is directly related to the name Fedor. It was one of the most common in the XVI-XVII centuries. That is why many people subsequently received generic names formed from this name. Last modified: 2025-01-23 12:01

Biology is the science of the general properties of all living things. It began its functioning as an independent discipline relatively recently, at the end of the 19th century. Science owes its appearance to the problems that existed between the definition of the concepts of living and inanimate natural bodies. Last modified: 2025-01-23 12:01

In the modern world, life is impossible without chemical reactions that take place everywhere and are both beneficial and dangerous. According to the periodic table of chemical elements of D. I. Mendeleev, metals of group 1 of the main subgroup, which include sodium, react violently with water, forming alkalis - chemically active substances. Last modified: 2025-06-01 07:06

Two-thirds of our planet is occupied by the World Ocean, which even in the current age of high technology is only a few percent explored. In addition, the underwater environment can be attributed to "hard-to-reach" regions, especially if we talk about great depths. Every year, scientists say that for one solved secret of underwater civilizations, there are several new ones. But can a civilization comparable to ours exist somewhere deep under water?. Last modified: 2025-01-23 12:01

What is meteoric iron? How does it appear on Earth? You will find answers to these and other questions in the article. Meteoritic iron is a metal found in meteors and consisting of several mineral phases: taenite and kamacite. It makes up the majority of metallic meteorites, but is also found in other types. Consider meteoric iron below. Last modified: 2025-01-23 12:01

The article is devoted to radioactive materials. Also considered are the effects of radiation and exposure to radiation, storage facilities for such materials, etc. Last modified: 2025-01-23 12:01

Instruments of radiation and chemical reconnaissance and control are used to determine the approximate level of concentration of toxic compounds in the air. The devices are used inside buildings and in open areas. With their help, the concentration of substances in food, water, fodder, on different surfaces is determined. Last modified: 2025-01-23 12:01

Phosphoric acid has been known for a long time and was discovered by accident during a chemical experiment. However, even today, due to its physical and chemical properties and relatively inexpensive production, it is widely used in various industries such as agriculture, dentistry, molecular biology, food industry, etc. Last modified: 2025-01-23 12:01

Black holes are huge space monsters that swallow entire planets. Their weight and dimensions are so huge that a person is simply unable to imagine these scales. Find out which of all black holes is closest to you and how dangerous it is for your life. Last modified: 2025-01-23 12:01

What is the hygroscopicity of materials. Hygroscopicity - what is it? This is comfort. Hydrophilic and hydrophobic fibers, hygroscopicity of different fabrics: wool, silk, viscose, linen, cotton. Percentage moisture absorption of different types of fabric. Last modified: 2025-01-23 12:01

We face teamwork every day. Coming to work, we communicate with our employees, returning home we meet with the family. And each group of people belongs to one or another type of collective. Modern science identifies several varieties of such communities, which we will discuss in this article. We will try to understand their functions and tasks. Last modified: 2025-01-23 12:01

Svetlana Savitskaya is the second female cosmonaut after Valentina Tereshkova, also known for performing a spacewalk. Last modified: 2025-01-23 12:01

Life is complicated. Therefore, a person willy-nilly has to choose. Correctly, any choice is organized as follows: a person thinks, figures out what is important and what is not. Then he sets priorities, and, of course, something has to be sacrificed, that is, neglected, this is quite natural. Today we will consider the meaning of the last verb, its synonyms and talk in detail about the various meanings. Last modified: 2025-01-23 12:01

Stars and planets, galaxies and nebulae - looking at the night sky for hours you can enjoy its treasures. Even a simple knowledge of the constellations and the ability to find them in the sky is a very useful skill. This article briefly describes the polar constellations of the northern hemisphere, and also gives practical instructions for finding them in the sky. Last modified: 2025-01-23 12:01

Iron oxide is a naturally occurring compound that serves as a mineral raw material for the production of steel and iron. Last modified: 2025-01-23 12:01