The usual phenomena are based on the most complex chemical processes, and behind the most common objects are great chemical discoveries and selfless inventors. We rarely guess about this and therefore hardly think. Meanwhile, without chemists, there would be no airbag, they came up with coin alloys, recognized the danger of radioactive metals and found a way to get fire without matches and lighters. You will read about why joints "click," how taste is formed, why salt has many shades, what gold dissolves in and even how glass flows. Ilya Abramovich Leenson - Candidate of Chemical Sciences, Senior Researcher, Faculty of Chemistry, Moscow State University, Associate Professor of the Higher College of Chemistry of the Russian Academy of Sciences, author of scientific and popular science articles, books and textbooks.