Scientific and technological progress at the end of the XIX – beginning of the XX century

– Creation of the theory of relativity and quantum theory
– Invention of the telephone, radio, electricity, telegraph, car and tram cinematography
– Discovery of X-rays
– The beginning of the era of aviation
– The emergence of the chemical and petroleum industries, electrical engineering, electrochemistry and electrometallurgy
– Creation of a planetary model of the atom
– Smelting steel and using minerals
– Implementation of the production line

Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.