We live in the era of nanotechnology. We have already lived in the era of nanotechnology for more than ten years. Do not know? Don't believe me? Do you have any doubts? The purpose of this book is to give knowledge, instill faith, and dispel doubts. Let's take an unbiased look at nanotechnology and see that it is nothing more than a new synthetic science, within which the long-awaited unification of physics, chemistry and biology took place. Let's look at the world around us, at ourselves, and see many nano-objects that make up the material basis of existence. We will visit industrial enterprises and discover a variety of nanotechnologies. And finally, let's look into the future and imagine how nanotechnology will change our lives. This popular science and interdisciplinary book is addressed to a wide range of readers interested in the problems of modern science and thinking about the future, including high school students who will have to build this future world - the world of the era of nanotechnology.