This book gives an overview of the most recent advances in emulsion science, from the preparation to the destruction of these materials. The book is intended for a large audience, from undergraduate students to senior scientists. A progressive and didactic approach is proposed for that purpose. The concepts presented, illustrated by more than 70 figures, provide a useful guidance for formulating and controlling the lifetime of emulsion at laboratory and industrial scales. This book is a new edition of the one published in the series Springer Tracts in Modern Physics (vol. 181). The main difference is a more didactic approach which will allow the non specialist reader to capture the essential concepts. The very latest research results (solid-stabilized emulsions, metastability) and novel applications (Biotechnology) are incorporated.