Summary of how muons are used in science and engineering.This book describes applications of muons in science and engineering. Research using muons relies on their basic properties and the microscopic interactions between them and surrounding particles. Examples of muon research include muon catalysis for nuclear fusion, the application of muon spin probes to study microscopic magnetic properties of materials, electron labeling to help in the understanding of electron transfer in proteins, and non-destructive element analysis of the human body. Cosmic ray muons can also be used to study the inner structure of volcanoes.This book describes applications of muons in science and engineering. Research using muons relies on their basic properties and the microscopic interactions between them and surrounding particles. Examples of muon research include muon catalysis for nuclear fusion, the application of muon spin probes to study microscopic magnetic properties of materials, electron labeling to help in the understanding of electron transfer in proteins, and non-destructive element analysis of the human body. Cosmic ray muons can also be used to study the inner structure of volcanoes.This volume describes applications of muons in science and engineering. Research using muons relies on their basic properties and their microscopic interactions with surrounding particles. Examples of muon research include muon catalysis for nuclear fusion; the application of muon spin probes to study microscopic magnetic properties of materials; electron labeling to help in the understanding of electron transfer in proteins; and non-destructive element analysis of the human body. Cosmic ray muons can also be used to study the inner structure of volcanoes.Preface; List of abbreviations; 1. What are muons? What is muon science?; 2. Muon sources; 3. Muons inside condensed matter; 4. The muonic atom and its formation in matter; 5. Muon catalyzed fusion; 6. Muon spin rotation/relaxation/resonanl³½