Now in its fourth edition, this bestselling dictionary contains 9,000 entries on all aspects of science. Ideal for both students and non-scientists, it provides comprehensive coverage of biology (including human biology), chemistry, physics, the earth sciences, and astronomy. Short biographies of leading scientists Full-page illustrated features on such subjects as El Niño, the Solar System, and Genetically Modified Organisms Chronologies of specific scientific subjects including plastics, electronics, and cell biology 'The book will appeal not just to scientists and science students but also to the interested lay person. And it passes the most difficult test of any dictionary-it is well worth browsing through.' New Scientist 'All entries are clear and brief, written in no-nonsense prose A handy reference work.' TES 'Handy and readable for scientists aged nine to ninety' Nature.