Woman is the Characteristic of Man From Animal Ethology to Human Nature
In this book, the author points out that although human beings are both mammals and primates, they differ in many significant ways from the other mammals and primates. Besides speech, laughter and the ability to use tools, the species Homo sapiens differs from its closest zoological cousins by three additional characteristics, which are less frequently cited because they are found only in the female. These are the female silhouette, hidden strus and the menopause. Rolf Schäppi is a psychiatrist and ethologist.