Completely revised, updated, and enlarged, this reference book is the best, most current encyclopedia available in convenient, highly portable, paperback form. Authoritative yet clearly written articles cover the complete spectrum of knowledge and activity for the student and general reader, from astronomy to psychology, from genetics to religion, and from archaeology to engineering, law, painting, music, contemporary culture, sports, and a host of other topics, plus a 16-page, full-color atlas of the Earth and the Universe.