Here is indeed a wealth of information. The encyclopedia boasts 6,500 alphabetically arranged entries, each written by an expert in the field, covering virtually every aspect of science and technology, from the structure of atoms to the functioning of the cell. Readers will find brief informative biographies of scientists and inventors as well as clear explanations of terms from all areas of science--including astronomy, chemistry, biology, botany, engineering, physics, and medicine, to name a few.