An entertaining and useful book by two famous theoretical physicists tells about the nature of a number of phenomena that we encounter in the world around us, in everyday life. Using the example of simple and familiar phenomena, the reader will see the effect of sometimes very complex physical laws. Here you can find answers to the questions: How to make good coffee? Can a mammoth be microwaved? How is the light going along the waveguide? The book will be especially useful for schoolchildren interested in physics and their teachers also because during the reading process they will get acquainted with some useful methods for assessing physical quantities that are important for understanding the phenomena occurring around.