… balmy holidays are a preview of something darker: bigger climate extremes, more natural disasters, the specter not of a world where humans suffer through these things and find ways to survive but where we’ve made the planet so uninhabitable that, in the longer run, the planet survives but we don’t. I was thinking about this while standing outside a science museum a couple of days ago with a friend. We were talking about the weather, but not the kind of small talk when you have nothing else to say. “I’m not sure our grandkids will even know what snow...