Science

A rocket in space today is not a dream, but an object of concern for highly qualified specialists who are faced with the task of improving existing technologies. What types of spacecraft are distinguished and how they differ from each other will be discussed in the article. Last modified: 2025-01-23 12:01

Air density varies. Where it is smaller, the air is rarefied. Let's find out what rarefied air means and what features it is characterized by. Last modified: 2025-01-23 12:01

The troposphere is one of the layers of the Earth's atmosphere. It has the greatest impact on the planet and is best studied by man. What is the composition of the troposphere? What properties does it have?. Last modified: 2025-01-23 12:01

The 19th and 20th centuries are the peak of new discoveries that have changed the world. The most famous biologists who lived at that time were able to colossally change the course of science. Probably, the most important studies were carried out only thanks to such personalities as Pavlov, Vernadsky, Mechnikov and many other famous biologists of Russia. Last modified: 2025-01-23 12:01

How can different types of chromatin affect the results of histological studies? Heterochromatin, euchromatin and their role in cytogenetics. Fundamentals of structure, function, genetic value and activity during the various phases. Last modified: 2025-01-23 12:01

The lesson is the main unit in the educational process. This is an organized form of education in which the teacher, for a clearly defined time, manages the cognitive and other activities of the team. In this case, the characteristics of each student are taken into account. Methods and means of work are used that create favorable conditions for students to master the basics of the subject being studied. This whole process is called the psychological analysis of the lesson. Last modified: 2025-01-23 12:01

With the widespread development of technology and science, philosophical knowledge is increasingly fading into the background. However, one should not forget that philosophy is the "mother" of all sciences. Thanks to it, you can trace the history of a particular discipline, find out its subject, place and development trends. The philosophical problems of technology and technical sciences will be discussed in detail in our material. Last modified: 2025-01-23 12:01

What is philosophical criticism? The answer to this question can be given from different positions. In our article, we will analyze in detail what the direction of criticism in philosophy is, as well as what branches it has. Last modified: 2025-01-23 12:01

Skill is the ability to perform a task with specific results, often for a specific amount of time, energy, or both. Skills can often be divided into general and specific skills. The types of special knowledge will be described in this article. Last modified: 2025-01-23 12:01

The need to encrypt correspondence arose in the ancient world and simple substitution ciphers appeared. Encrypted messages determined the fate of many battles and influenced the course of history. Over time, people invented more and more advanced encryption methods. And today we have a whole interesting science called cryptography, which deals with the study of ciphers. Last modified: 2025-01-23 12:01

Permutation ciphers are known ways to hide information from prying eyes. In the classical sense, a cipher is an anagram. Its essence lies in the fact that the letters of the message change positions according to a certain rule. Then the key to the cipher is to change the order of the characters in the plaintext. However, the dependence of the key on the length of the encryption gave rise to many inconveniences for use. But smart heads found interesting tricky solutions. Last modified: 2025-01-23 12:01

Cosmonautics regularly achieves stunning success. Artificial satellites of the Earth are constantly finding more and more diverse applications. Being an astronaut in near-Earth orbit has become commonplace. This would not have been possible without the main formula of astronautics - the Tsiolkovsky equation. Last modified: 2025-01-23 12:01

Mathematical statistics is a methodology that allows you to make informed decisions in the face of uncertain conditions. The study of methods for collecting and systematizing data, processing the final results of experiments and experiments with mass randomness, and discovering any patterns is what this branch of mathematics does. Consider the basic concepts of mathematical statistics. Last modified: 2025-01-23 12:01

Saturn is one of the largest and most mysterious planets in the solar system. The rings of Saturn hide many secrets. Humanity reveals some of them, but others immediately arise. The more information we get, the more questions arise. The mysteries of the rings of Saturn are discussed in the article. Last modified: 2025-01-23 12:01

Halley's Comet is the most famous comet that can be observed from Earth. There are many stories and superstitions associated with it. In different eras, people perceived her periodic appearances differently. Interesting facts about this heavenly wanderer are given in the article. Last modified: 2025-01-23 12:01

Humanity has been so often predicted the end of the world that it is becoming habitual. It is expected almost every year. The article tells about the history of such predictions, which, apparently, will never end, as well as various theories and ways to protect yourself. Last modified: 2025-01-23 12:01

The term "microscopy" has Greek roots. In translation, it means the study of objects using high-precision instruments. Recently, fluorescence and electron microscopy have become increasingly popular. Last modified: 2025-01-23 12:01

A long time ago, at the beginning of time, our ancestors, stuffing bumps, developed a set of behavioral stereotypes. You can't climb into the mouth of a lion - you'll get scratched, you can't jump from the top of a cliff - you'll hurt yourself. And in general: not knowing the ford, do not poke your head into the water! This is all - the instinct of life, or rather, the instinct of self-preservation for the sake of life. Last modified: 2025-01-23 12:01

The fundamental element of the study of the overwhelming number of natural sciences is matter. In this article we will consider the concept, types of matter, forms of its movement and properties. Last modified: 2025-01-23 12:01

What theories are there? What do they describe? What is the meaning of such a phrase as "Scientific theories"?. Last modified: 2025-01-23 12:01

Method is a very broad concept, applicable to almost every science and inextricably linked with research. However, it has a very precise definition. The history of the development of methods and methodology is divided into two periods, which will be discussed in more detail in this article. Last modified: 2025-01-23 12:01

The theory of relativity, the formulas of which were presented to the scientific community by A. Einstein at the beginning of the last century, has a long and fascinating history. On this path, scientists were able to overcome a lot of contradictions, solve many scientific problems, and create new scientific branches. At the same time, the theory of relativity is not some kind of final product; it develops and improves along with the development of science itself. Last modified: 2025-01-23 12:01

The existence of social needs is due to the life of a person with other individuals and with constant interaction with them. Society influences the formation of the personality structure, its needs and desires. Harmonious development of the individual outside of society is impossible. The need for communication, friendship, love can only be satisfied in the process of interaction between a person and society. Last modified: 2025-01-23 12:01

There are quite a few different kinds of rocks on earth. All of them are actively used by man in industry. Last modified: 2025-01-23 12:01

Scientific and cultural-spiritual activity has long been the most important sphere of life of human societies. However, it could not exist without the main means of communication - language. One of the greatest in the history of mankind was Latin. Last modified: 2025-01-23 12:01

The amygdala, otherwise known as the amygdala, is a small collection of gray matter. It is about him that we will talk. The amygdala (functions, structure, location and its defeat) has been studied by many scientists. However, we still do not know everything about him. Last modified: 2025-01-23 12:01

The heliocentric system of the world was proposed by Copernicus. It has become a real revolution in astronomy. After reading this article, you will get acquainted with Copernicus and his contribution to science. But first we will talk about what was proposed before him by Ptolemy. Last modified: 2025-01-23 12:01

It's no secret that communication is a very important, even an integral part of social relations. This concept primarily means the exchange of various kinds of information between subjects. Last modified: 2025-01-23 12:01

Everyone knows that bats and dolphins emit ultrasound. Why is this needed and how does it work? Let's see what echolocation is and how it helps animals and even people. Last modified: 2025-01-23 12:01

There are many sciences in the world. One of them is geodesy. What is this science? What is she studying? Where can you learn it? You will find answers to these and other questions in this article. Last modified: 2025-01-23 12:01

Every student who is familiar with the periodic table knows that the amount of metals in it makes up most of the chemical elements. One of the important physical characteristics for them is density. Consider this value in the article and give tables of the density of metals and alloys. Last modified: 2025-01-23 12:01

For 50 years, researchers and scientific groups from all over the world have wanted to know detailed information about this or that planet. This is not accidental, because many people dream of finding out the origin and significance of other planetoids and celestial bodies. What is lunar soil and what does it look like? You can find out this and much more in our article. Last modified: 2025-01-23 12:01

Man is a creature, an animal. But it is distinguished from other living beings by the presence of reason, the ability to think and perform logical operations. How did he acquire these abilities? And how did he start using them? What is the human mind?. Last modified: 2025-01-23 12:01

A species named as a pet and as food for snakes or other reptiles is Rattus norvegicus. The white rat, the so-called laboratory rat, is very common. But manufacturers have developed color variations of these rats. Last modified: 2025-01-23 12:01

In 1897, at the age of 30, Maria Skłodowska, who married Pierre Curie in 1895, finished her studies at the Sorbonne in Paris and was thinking about the subject of her dissertation. The X-rays discovered by Wilhelm Conrad Roentgen in 1895 were still a hot topic, but they had lost their novelty charm. Last modified: 2025-01-23 12:01

We often hear that somewhere scientists conducted a study and found out why this or that situation happened. And why are they carried out at all, in what areas, and what do they want to prove with the help of them?. Last modified: 2025-01-23 12:01

Another name for it is hydrocyanic acid. It is this dangerous substance that has a pleasant smell of almonds. Last modified: 2025-01-23 12:01

Everyone has encountered such a process as temperature measurement. Every home has a medical or room thermometer. And in what cases is temperature measurement still required and how is it carried out?. Last modified: 2025-01-23 12:01

In the summer months of the past few years, we have increasingly complained about the unbearable heat of July or August. In this regard, it would be interesting to know what temperatures are generally possible on our planet. Last modified: 2025-01-23 12:01

Functions of the lymphatic system. Lymphatic capillaries and their purpose. The structure of the lymphatic vessels. The importance of lymph for the human body. Differences between the lymphatic system and the circulatory system. Anatomically, the lymphatic system consists of: lymphatic capillaries, lymphatic vessels with increased caliber; they merge into ducts or trunks, lymph nodes and the lymphatic organs themselves. Last modified: 2025-01-23 12:01