Galileo's Pendulum

Like Tupac Shakur, Albert Einstein looms large in the popular imagination after his death. Seemingly every story relating to quantum entanglement must mention Einstein’s famous phrase “spooky action-at-a-distance” (spukhafte Fernwirkung), every article on dark energy references “Einstein’s greatest blunder”. New ideas about gravity or experiments that seemingly violate the speed of light summon Einstein’s shade.…