Quantum gravity

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 […]

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 […]