In Russia, there is a linguistic genius, Professor Sergey Anatolyevich, who is the head of a department at a humanities university. He is fluent in 400 languages, including ancient tongues and endangered minority languages. Remarkably, he learns each new language in just three weeks, earning him the title of 'living encyclopedia.' Despite this, he humbly claims that his memory is not exceptional. He elaborates on his methods for learning and memorizing languages, as well as his unique insights into language evolution and unity. He also attributes his linguistic talents to family heritage, as both his father and brother are language experts. Professor Sergey shares his learning techniques and passion for language study, revealing his distinct understanding of linguistics.