At Lincoln Park Zoo, lots of people, but not many animals. Why? The heat, of course.

The lion enclosure was empty. The gorillas, gone. The rhino, which can typically found standing stolidly in the old elephant enclosure, looking like a beast from mythology, was standing somewhere else, out of view. My wife and I were strolling the Lincoln Park Zoo late Saturday afternoon, a beautiful day, the zoo crowded. With people that is. With animals, not so much. "Is it me," I wondered aloud, "or is something missing?" We'd seen a scattering of pink flamingos. And that's about it. …