Experiments allowed man to settle and understand his place in this world. We achieved everything through experience, through trial and error, through disappointment and incredible success. The experiment affects adults and children, people and animals. He follows us everywhere, in all areas of our existence, at all stages of history. Making tools, taming wild animals, searching for edible plants, or traveling to unexplored lands - wasn't this an experiment for ancient man? But if the world around us has been explored, what remains to be studied? That's right, our psyche. This book describes psychological experiments that domestic authors have not yet brought to the attention of the general public. You've probably heard about the famous Stanford prison experiment, when ordinary people were asked to "play" guards and prisoners, and what came of it, but have you heard about the Marshmallow Experiment? What is hidden behind “learned helplessness”? Do you know why animals die en masse under ideal living conditions? After reading about the polar bear experiment, can you help but think about it? Can you raise a child with a monkey? The questions the author raises are the ethics and humanity of a psychological experiment, the transformation of its goals after many decades, service for the benefit of humanity... Or are they scandalous mistakes of scientists?