Author Description

Material within each feature--biographies, essays, definitions, diagrams, experiments, and the timeline--is arranged according to the following scientific disciplines: - Animal Anatomy- Astronomy and Space Technology- Atomic Physics- Biochemistry- Biology- Botany- Chemistry- Computer Science- Earth Science- Environmental Science- General Science- Genetics- Health and Medicine- Human Anatomy and Physiology- Marine Science- Physics- Weather and Climate.- Biographies: approximately 1,900 biographies of key scientists throughout history, many with accompanying images- Essays: more than 2,000 essays on current issues in science, technology, and society- Definitions: more than 28,500 definitions- Diagrams: more than 3,000 printable diagrams, many in full color- Experiments: more than 600 science experiments covering key principles in science, indexed by grade range and subject category- Timeline: more than 5,600 updated chronology entries, organized by time period or scientific topic- National Science Education Standards- Further Information- Web Links: some of the Web's best science education sites, arranged by topic--selected by our editors.