In a few short years in the early 20th century, an iconoclastic young physicist single-handedly transformed our understanding of the universe. With his special and general theories of relativity, Albert Einstein overturned the solid certainties of Newton’s clockwork universe and replaced it with one that defies common sense understanding. His work brought us the famous equation E=mc2, revealed light as the fastest thing in the universe, and introduced the bizarre concept of time dilation. It unified space and time, redefined gravity, and ushered in the idea that the universe began in hot, dense fireball we now call the big bang. These ideas later gave rise some of the most intriguing and mind-boggling ideas in modern physics: black holes, dark matter and energy, and time travel. Today’s physicists are still wrestling with his ideas and their consequences, including how to build them into the ultimate theory of everything.

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