Have you heard the one about Sisyphus and his rock? He braces for one final heave as the “pitiless” boulder slips from his grasp and tumbles down Hades’ hill. Again, and again. “So once more,” Odysseus attests of Greek mythology’s Groundhog’s Day, “he had to wrestle with the thing and push it up, while the sweat poured from his limbs and the dust rose high above his head.”