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Language
English
Description
Records show that human beings have been using codes to conceal messages for over 2,000 years! This revealing book traces codes throughout history, from an encryption device used by the Spartans in 400 B.C. to the Enigma Code of the 1940s, pausing to consider coded military secrets and newspaper scoops alike. Students will be delighted by code-cracking diagrams. Illuminating sidebars, primary source documents, and vivid illustrations all add to this...
Author
Series
Language
English
Description
It has been nearly 200 years since the first dinosaur remains were found in southern England, and in that time these fascinating creatures from long ago have lost none of their hold on our imagination. This book explores the history of dinosaurs and their time on earth. A detailed timeline traces the archaeological discoveries that inform today's study of prehistoric life, and clear, informative illustrations and diagrams explore different kinds of...