Budding scientists and those entering the fascinating world of science for fun or study will find both intrigue and inspiration in these three volumes. The original 3-vol. set presented detailed biographies of 150 women and men whose theories, discoveries and inventions revolutionized science and society. From Louis Pasteur to Bill Gates and Elijah McCoy to Margaret Mead, "Scientists" explores the pioneers and their innovations that students most want to learn about. Vol. 4 adds 33 additional biographies (Joy Adamson, Carl Sagan and more); vol. 5 adds 34 more (Hippocrates and Fred Hoyle, among others); vol. 6 adds 34 more (including Howard Aiken, Ptolemy, and Nancy Wexler). Scientists from around the world and from the Industrial Revolution to the present are featured in fields like astronomy, ecology, oceanography, physics and more. In "Scientists," students will find: Scientist biographies, each focusing on the scientist's early life, formative experiences and inspirations -- details that keep students reading "Impact" boxes that draw out important information and sum up why each scientist's work is indeed revolutionary Sidebar boxes that highlight individuals who influenced the work of the featured scientist or who conducted similar research, as well as related information of special interest to students Sources for further reading so students know where to delve even deeper Black-and-white portraits and additional photographs that give students a better understanding of the people and inventions discussed Each volume begins with a listing of scientists by field, ranging from archaeology to zoology; a timeline of major scientific breakthroughs; and a glossary of scientificterms used in the text. Volumes conclude with a cumulative subject index so that students can easily find the people, inventions and theories discussed throughout "Scientists."