Since its first publication in 1995, the 『Science Masters』 series has been translated and published in 26 countries around the world. It is a world-renowned science textbook series that introduces hotly debated topics in the scientific community and core knowledge of basic science, from astronomy, which deals with the macrocosm, to brain science, which delves into the core of the microcosm called human beings, in an easy-to-understand manner. About 20 scientists who are not awkwardly called masters, meaning experts or virtuosos, have put their passion and teachings into this series.


"Why is Sex Fun" is a book by Jared Diamond, a world-renowned evolutionary biologist, physiologist, and civilization scholar. It delves into questions we've always been curious about but are too embarrassed to ask: Why is sex fun? Why do humans have sex in secret? Why do humans have sex whenever they want? Why do females go through menopause? Why are male genitals so large?
This book, which uses evolutionary biology to solve problems we have taken for granted but have not actually understood, one by one, reveals in a fascinating way the role that human sexual habits, unique to humans, have played in creating human cultural characteristics, based on the latest research in evolutionary theory and physiology.