
by Isaac Asimov · Plaza & Janés · tapa blanda · ISBN 9788401803123

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«X representa lo desconocido» is a collection of popular science essays by Isaac Asimov, published by Plaza & Janés in paperback (266 pages, in Spanish).
Seventeen essays in which Asimov addresses questions such as where the center of the universe is, when Halley's comet will return, or what is wrong with astrology. He also speculates about life forms based on silicon and about the limits of the electromagnetic spectrum, with the expository clarity that characterizes his science writing.
The original English title is «X Stands for Unknown» and the work belongs to the Divulgación collection from Plaza & Janés.
Recommended for readers interested in popular science and in Asimov's essayistic side.

Isaac Asimov was an American writer and professor of biochemistry at Boston University. During his lifetime, Asimov was considered one of the "Big Three" science fiction writers, along with Robert A. Heinlein and Arthur C. Clarke. He wrote or edited more than 500 books and an estimated 90,000 letters and postcards. Best known for his hard science fiction, Asimov also wrote mysteries and fantasy, as well as popular science and other non-fiction. His work spans nine out of the ten categories of the Dewey decimal system.
