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quantum gravity

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    When Gravity Breaks Down

    Theoretical physicists have known since the 1930s that quantum gravity is necessary to bring order into the laws of nature, but 80 years on, a solution isn’t anywhere in sight.Photograph by Andrea / Flickr Albert Einstein’s theory of general relativity is more than a hundred years old, but still it gives physicists headaches. Not only […]

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    Why Theories of Everything Are Ill-Conceived

    The police don’t often sympathize with speeding drivers, but if you’re a quantum gravity physicist who was distracted by a grand epiphany while driving at night, you might have a better chance. “The Italian policeman asked me politely if I was crazy to drive at that speed,” writes the Italian physicist Carlo Rovelli in his […]