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Along with Caltech physicist Mlodinow (The Drunkard's Walk), University of Cambridge cosmologist Hawking (A Brief History of Time) deftly mixes cutting-edge physics to answer three key questions-- Why is there something rather than nothing? Why do we exist? Why this particular set of laws and not some other?-- and explains that scientists are approaching what is called "M-theory, " a collection of overlapping theories (including string theory) that fill in many (but not all) the blank spots in quantum physics. This collection is known as the "Grand Unified Field Theories."

Unified field theories --- Mathematical physics --- Superstring theories --- Théories du champ unitaire --- Physique mathématique --- Supercordes (Physique nucléaire) --- Popular works --- Ouvrages de vulgarisation --- Cosmology --- Einstein unified field theory --- Field theories, Unified --- Unified field theory, Einstein --- Unified theories --- Superstrings (Nuclear physics) --- Theories, Superstring --- Physical mathematics --- Physics --- Mathematics --- Electromagnetic theory --- Field theory (Physics) --- Relativity (Physics) --- Supergravity --- Supersymmetry --- String models --- Popular works. --- Unified field theories - Popular works --- Superstring theories - Popular works --- Mathematical physics - Popular works