Vladimir Ilyich Lenin is a key figure of the entire Bolshevik movement and probably the most prominent political figure of the 20th century. After his death, the leader of the world proletariat was turned into a real mummy and put on display in the mausoleum. To this day, Lenin remains a historical artifact of a bygone era, and no one is in a hurry to part with him through burial.

Why is it called QR Code

QR Code stands for Quick Response code. It's a two-dimensional matrix barcode designed for storing information that can be quickly accessed. Originally developed in Japan in 1994 for the automotive industry, QR codes have become widely adopted across Europe for various purposes including marketing, payments, and digital services.

The Earth's population in 2025 reaches approximately 8.1 billion people. This figure is distributed unevenly across regions, reflecting socioeconomic differences, levels of urbanization, access to healthcare, and the cultural characteristics of countries.

Population growth is slowing in developed countries where birth rates are declining, but it continues in developing regions—Africa, South Asia, and Latin America. These demographic changes impact labor markets, migration flows, resource distribution, and social policies.

If you have ever inflated car tires or used a pump, you have likely encountered different units of pressure: bar, atmospheres (atm), and psi. These units are often confused, but there are important differences between them. In this article, we will figure out what they mean, where they are used, and how to convert them into one another.

Why are inventive people called "Kulibins"? Find out who Ivan Petrovich Kulibin was, what inventions he created, and why his name became a symbol of folk genius and technical ingenuity.

The issue of alcohol consumption remains one of the most important topics in public health and social policy worldwide. According to the World Health Organization, over half of the world's adult population consumes alcoholic beverages at least once a year. However, the patterns, volume, and consequences of this consumption vary significantly between countries and regions. By analyzing the scale of consumption, one can identify both cultural and economic characteristics, as well as social risks associated with alcohol use in the population.