Worlds Within Worlds: The Story of Nuclear Energy Volume 1 Atomic Weights · Energy · Electricity by Isaac Asimov U. S. Energy Research and Development Administration Office of Public Affairs Washington, D.C. 20545 Library of Congress Catalog Card Number: 75-189477 1972 _Nothing in the history of mankind has opened our eyes to the possibilities of science as has the development of atomic power. In the last 200 years, people have seen the coming of the steam engine, the steamboat, the railroad locomotive, the automobile, the airplane, radio, motion pictures, television, the machine age in general. Yet none of it seemed quite so fantastic, quite so unbelievable, as what man has done since 1939 with the atom ... there seem to be almost no limits to what may lie ahead: inexhaustible energy, new worlds, ever-widening knowledge of the physical universe._ Isaac Asimov [Illustration: Photograph of night sky] The U. S. Energy Research and Development Administration publishes a series of booklets for the general public. Please write to the following address for a title list or for information on a specific subject: USERDA—Technical Information Center P. O. Box 62 Oak Ridge, Tennessee 37830 [Illustration: Isaac Asimov] ISAAC ASIMOV received his academic degrees from Columbia University and is Associate Professor of Biochemistry at the Boston University School of Medicine. He is a prolific author who has written over 150 books in the past 20 years, including about 20 science fiction works, and books for children. His many excellent science books for the public cover subjects in mathematics, physics, astronomy, chemistry, and biology, such as _The Genetic Code_, _Inside the Atom_, _Building Blocks of the Universe_, _Understanding Physics_, _The New Intelligent Man’s Guide to Science_, and _Asimov’s Biographical Encyclopedia of Science and Technology_. In 1965 Dr. Asimov received the James T. Grady Award of the American Chemical Society for his major contribution in reporting science progress to the public. [Illustration: Photograph of night sky]