The book of academician Fersman and his students fascinatingly introduces young people to the world of chemistry and physics. Each story is a single image, where the materials themselves are connected, and people who were looking for them tens and hundreds of years ago, and the modern world. Small illustrations are abundantly scattered on the pages: tiny plots with atom balls, ancient scientists, ships, paravoses, sunflowers, tiny geologists in the taiga... There is not a single page without at least a small picture! At the same time, there are rare portraits of scientists: Maria Sklodovskaya-Curie, D. I. Mendeleev; photographs of places and scientific instruments; also in the book there are many serious schemes about the structure of minerals - this is a real children's encyclopedia, published fifty years before Avanta +!