Under a White Sky: The Nature of the Future

by Elizabeth Kolbert

“You can’t step into the same river twice,” Heraclitus is supposed to have said, to which one of his followers, Cratylus, is supposed to have replied, “You can’t step into the same river even once.”

If Chicago is the City of the Big Shoulders, the Sanitary and Ship Canal might be thought of as its Oversized Sphincter.