The original words announcing great scientific discoveries, from the first ‘Eureka!’ to the cloning of Dolly the sheep, can all be found in this dictionary. Put together over 15 years with the assistance of a distinguished team of specialist advisers, it includes full author descriptions and exact sources. Scholarly but accessible, it presents the human face of science, as scientists reflect on achievements and failures in their own lives and those of others. Darwin describes natural selection and assesses the pros and cons of marriage; James Clerk Maxwell constructs an electric but poetic Valentine as well as his ‘demon’. In this book you can find out who believed that ‘Science and everyday life cannot and should not be separate’, and who liked to ask what he would do if he were ‘a carbon atom or a sodium atom’.