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New York: Crown Publishers, Inc., 1982. First Edition. First Printing. 339, index, library stamps (one crossed out in marker), small stains ins flylves & rear bd, DJ in plastic sleeve (soiled & scratched) library stickers on DJ and plastic sleeve (some crossed out in marker). How people have learned, and continue to learn, about their world, from the great migrations of prehistory to the space probes of today. Chapters discuss discoveries in astronomy, biology, geography, mathematics, geology, and physics.
New York: Dell Yearling, 1990. First Printing. Wraps. quarto/ 32 pages. Wraps. Profusely illustrations (many in color). Glossary. Index. Covers soiled. Some wear to cover and spine edges. Book for young readers. Isaac Asimov (January 2, 1920[a] – April 6, 1992) was an American writer and professor of biochemistry at Boston University. He was known for his works of science fiction and popular science. Asimov was a prolific writer who wrote or edited more than 500 books and an estimated 90,000 letters and postcards. His books have been published in 9 of the 10 major categories of the Dewey Decimal Classification. "Unidentified Flying Objects" is one volume from a lengthy series of more than 25 books that Isaac Asimov wrote to explain astronomy to children called Library of the Universe. Each volume has full-color photographs on every page.