Each volume of the Dictionary of World Biography contains 250 entries on the lives of the individuals who shaped their times and left their mark on world history. This is not a who's who. Instead, each entry provides an in-depth essay on the life and career of the individual concerned. Essays commence with a quick reference section that provides basic facts on the individual's life and achievements. The extended biography places the life and works of the individual within an historical context, and the summary at the end of each essay provides a synopsis of the individual's place in history. All entries conclude with a fully annotated bibliography.

Over 220,000 entries representing some 56,000 Library of Congress subject headings. Covers all disciplines of science and technology, e.g., engineering, agriculture, and domestic arts. Also contains at least 5000 titles published before 1876. Has many applications in libraries, information centers, and other organizations concerned with scientific and technological literature. Subject index contains main listing of entries. Each entry gives cataloging as prepared by the Library of Congress. Author/title indexes.

Who names newly discovered planets? What exactly are black holes? Where are there the most earthquakes? When did the first Homo sapiens walk the earth? Why is the night sky dark? How does the fluoride in toothpaste prevent cavities? Since 1845, Scientific American has answered questions and provided the best information available in all areas of science. Now, Scientific American is proud to present an accessible, one-volume reference covering all the sciences. Whether you want to examine the tiniest microbes, the properties of the earth's core, or the farthest reaches of space, this handy desk reference is the resource to turn to for the answers you need. * Over 500 biographies of key science figures * Thousands of glossary terms * Hundreds of useful Web sites * Tables, charts, diagrams, and illustrations * Sidebars featuring fascinating facts, mnemonic aids, and quizzes * Essays exploring ideas in-depth

Revised and updated, containing over 5,000 entries, with over 1,100 more entries than in the previous edition, Animal Behavior Desk Reference, Second Edition: A Dictionary of Behavior, Ecology, and Evolution provides definitions for terms in animal behavior, biogeography, evolution, ecology, genetics, psychology, statistics, systematics, and other related sciences. Formatted like a standard dictionary, this reference presents definitions in a quick- and easy-to-use style. For each term, where applicable, you receive: Multiple definitions listed chronologically Term hierarchies summarized in tables Definition sources Directives that show where a concept is defined under a synonymous name, and concepts related to focal ones Non-technical and obsolete definitions Pronunciations of selected terms Common-denominator entries Synonyms Classifications of organisms and descriptions of many taxa Organizations related to animal behavior, ecology, evolution, and related sciences Still the most complete work of its kind, Animal Behavior Desk Reference, Second Edition: A Dictionary of Behavior, Ecology, and Evolution will improve your scientific communication, particularly in the fields of animal behavior, evolution, ecology, and related branches of biology. If you are a teacher, student, writer, or active in science in any way, this book will prove to be one of your most valuable resources.

Plate Tectonics, Revised Edition fully explains the theory that provides a single guiding principle to the earth's geological history.