In the lucid and information packed style that has rendered the author outstanding in the juvenile science field, Isaac Asimov describes twenty-six men and the moments at which they reversed the course of scientific thought. From Archimedes to Robert Hutchings Goddard, these men accomplished a major breakthrough by establishing original and hitherto unrevealed laws. And from these laws the course of science assumed a dramatically new direction. Embracing every area of science, this is a readable text which should interest even the most reluctant student, and is therefore recommended to school libraries.