This new edition of the famous scholarly reference work contains biographies of scientists from antiquity to modern times, but excludes scientists who were alive when the Dictionary was first published. It includes scientists who worked in the areas of mathematics, physics, chemistry, biology, and earth sciences. The work is notable for being one of the most substantial reference works in the field of history of science, containing extensive biographies on hundreds of figures. It supplies both both personal biography and considerable detail concerning the subjects' scientific contributions. — description adapted from the Wikipedia