The McGraw-Hill Yearbook of Science & Technology 2002 supplements and updates the 8th Edition of the McGraw-Hill Encyclopedia of Science & Technology. Expertly edited and well illustrated for ease of understanding, it keeps students, scientifically interested general readers and professionals up to date on the most important current developments in science, engineering and technology. More than 170 articles by 200 of the world's leaders in science and technology provide concise yet authoritative reviews of the progress and significance of research on forefront topics, such as Ancient DNA, Astrobiology, Cancer Detection, Climate Change, Forensic Engineering, Natural Fission Reactors, Schizophrenia, and Wearable Computers.