The Mysterious Universe is a popular science book by the British astrophysicist Sir James Jeans, first published in 1930 by the Cambridge University Press. In the United States, it was published by Macmillan. The book is an expanded version of the Rede Lecture delivered at the University of Cambridge in 1930. It begins with a full-page citation of the famous passage in Plato's Republic, Book VII, ... Wikipedia