Introduces discoveries that changed science by such notable men and women as Copernicus, William Harvey, Galileo, Isaac Newton, Thomas Edison, Louis Pasteur, Henry Bessemer, Charles Darwin, Gregor Mendel, Dmitri Mendeleyev, Max Planck, Madame Curie, Albert Einstein, Dorothy Hodgkin, and others. Illustrated with photographs.

Includes bibliographical references (p. 46), glossary, and index.

Copernican theory -- Blood circulation -- Lenses that magnify -- The theory of gravity -- Electricity -- The first medical use of ether -- Germ theory -- Bessemer process -- The theory of evolution -- Genetics -- Periodic table -- Quantum theory -- Radioactivity -- Theory of relativity -- Vitamins -- Insulin -- Penecillin -- DNA -- Polio vaccine -- Plate tectonics.