Before Big Bang theories
The book takes up how the inaccuracies of the theories of Copernicus and Galileo lead them to be dismissed. Copernicus and Galileo used false arguments to persuade people that the Earth went in circles around the Sun, and that the Sun was the center of the universe. Both these statements were alien to the public at the time, and are still alien to a modern public. Only the finally mathematically correct interpretation of Johannes Kepler made the theories accepted, within a single generation. As Singh points out, the old generation must die before a new theory can be accepted.The Big Bang theory evolves
In parallel to the evolution of the Big Bang theory, the book tells the personal stories of the people who played a part in advancing it, both by hypothesis and by experiment. These include Albert Einstein, for his General Relativity, Alexander Alexandrovich Friedman for first discovering that this theory led to an expanding universe, Georges Lemaître who concluded independently of Friedman discovered an expanding universe, and then that the theory must lead to an initial event of creation, which is the Big Bang theory we know today, Edwin Hubble for observing that the universe expanded, thereby confirming Friedman and Lemaître, George Gamow, Ralph Asher Alpher, Robert Herman, Martin Ryle, Arno Allan Penzias and Robert Woodrow Wilson, among many others. Another theme of the book is the scientific method itself: how serendipity, curiosity, theory and observation come together to expand our understanding of the world. One of the most interesting points in the book is how Einstein initially dismissed the theory out of hand. Such was his authority in the scientific community that none dared oppose him, thereby stifling research in this area for many years. However, when Hubble confirmed the theory, Einstein was quick to endorse both Lemaître and his theories.Reception
William Grimes (journalist), William Grimes of ''The New York Times'' praised Singh's ability to retain the reader's entertainment and comprehension even whilst explaining difficult scientific concepts, through use of diagrams, writing and illustrations. He wrote that, "[m]ore than the history of a single theory, [''Big Bang''] is an argument for the scientific method and for the illuminating power of human reason."References
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