Blood in its symbolic and physiological manifestation has always fascinated people, and sometimes played a key role in the development of the entire civilization. This book is a whole journey in human history, which was carried out by a hematologist and specialist in blood and its diseases. You will learn how ideas about the properties of blood have changed and how the main discoveries in the field of hematology took place. You will get acquainted with the primitive and sacred history of blood and the numerous legends that have developed around it. You will find yourself at the origins of blood science, you will witness strange, dangerous and sometimes terrible medical ones.