This lively well-illustrated collection of articles written by a group of particle physicists at Los Alamos National Laboratory presents to the expert and non-expert alike a comprehensive overview of the major theoretical and experimental advances of the past twenty years. It explains the emergence of a profoundly new understanding of the fundamental forces of Nature. With the unification of the weak and electromagnetic interaction, physicists now stand at the brink of a complete unification of all the forces, including gravity. This achievement brought with it a rich vocabulary of names and concepts: quarks, gluons and nonabelian gauge theories. The exposition of these ideas, done on a variety of technical levels is designed to interest a broad audience ranging from the professional theorist and experimentalist to the inquisitive student. Anyone with an interest in particle physics can enjoy this book.

Scaling relationships are a persistent theme in biology. Examples include branching patterns of blood vessels, structural and functional correlates of body size, distribution of body size and abundance among species, and variations in populations within an area or over time. This book, based on a conference at the Santa Fe Institute, brings together many of the most prominent workers in the area to assess our current understanding of scaling relationships at the physiological, biomechanical, and ecological levels.