The impact of hormones on human life is enormous. Even what is considered to be exclusively the sphere of psychology - human feelings and emotions - arises as a result of chemical changes in the brain. A small organ weighing about one and a half kilograms is better than a better computer. It allows you to perceive the surrounding reality, to know the world, to remember what you see and what you hear. And just function! This book is about those secrets of the brain that have already been comprehended by scientists, and about those that have yet to be solved. How does the brain receive signals from other senses and transmit commands to them? How does memory work? How can stress be affected? About this and much more - in our book.