About the book: 2011 / The book for the first time brought together teachers, scientists and students of various specialties: physicists, mathematicians, engineers, chemists, geologists , biologists, doctors, economists, historians, philologists, philosophers, etc. In classrooms, laboratories, field work and military training, reasoning in conversations or alone, they produce unexpected pearls, shooting arrows of free or involuntary wit, giving birth to thoughtful Aphorisms and “blunders”, then passed on from mouth to mouth, entering the memory of generations. The book continues and significantly expands the field of humor “plowed up” by popular publications: “Soviet physicists are joking... Although there was no time for jokes” (M.: URSS, 2010), “Mathematicians also joke” (M.: URSS, 2010), “Chemists still joking" (M.: URSS, 2010), "Geologists are joking... And not joking" (M.: URSS, 2010), "Scientists are joking" (M.: URSS, 2011), "Physicists continue to joke" (M. : URSS, 2011). As the great Landau said: “The worst sin is to be bored. Anecdotes are useful because it is useful to laugh.” The book is intended for teachers, students, and scientists of various specialties. Most of the jokes, funny and unusual stories given in it will be understandable to a non-specialist. Therefore, this funny book can be offered to all lovers of humor..