The book is dedicated to scientific creativity, its motivation, the discoveries of world-famous scientists, and the scientific and moral atmosphere in scientific communities. There is also information about Belarusian researchers. Written on the basis of examples and facts from both printed sources and personal observations and generalizations of the author. Addressed to all those who are interested in the history of science, and, above all, to schoolchildren, students, graduate students, young scientists - that age category of society that most often has questions (how? what? why?) and the desire to find out.