It was to be the final theory, a single framework that would unite all the forces of the cosmos and choreograph everything from the motion of the expanding universe to the most minute dance of subatomic particles. The challenge was to write an equation whose mathematical elegance would encompass the whole of physics. Some of the most eminent physicists in the world embarked upon this quest. Stephen Hawking even gave a talk with the auspicious title “Is the End in Sight for Theoretical Physics?” If such a theory is successful, it would be science’s crowning achievement. It would be the holy grail of physics, a single formula from which, in principle, one could derive all other equations, starting from the Big Bang and moving to the end of the universe. It would be the end product of two thousand years of scientific investigation ever since the ancients asked the question, “What is the world made of? It is a breathtaking vision.
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