Life without mystery is insipid and boring. The presence of mystery is a challenge for us, and the desire to penetrate into it is the strongest stimulus for our actions. Imagine that we know EVERYTHING - how uninteresting it is! Knowing in advance everything that is going to happen is like reading an interesting book from the end; What makes a mystery so interesting is that it can be revealed. We are lucky: we live in a huge world that we will never fully understand... The authors of the articles collected in this book will introduce you to the secrets that are eagerly awaiting their discoverers today; and also from these articles you will learn about ancient, but perhaps very useful methods of understanding the world in which we live. These articles were published for more than 10 years in the magazines “New Acropolis” and “Man Without Borders” and invariably caused a huge reader interest. The authors of the articles are scientists, natural science teachers and philosophers with extensive practical experience.