Take the E train

摘要

What a brilliant idea for a book: a short, snappy account of E = mc~2, the most famous equation in science. The wonder is that no one thought of it sooner. Almost a century has passed since Einstein unveiled this most astonishing implication of his special theory of relativity—so astonishing, indeed, that even he felt moved to add a question mark to the title of the paper containing its derivation: "Does the inertia of a body depend on its energy content?"