In the NYT, Diane Ackerman asks why human animals flock to zoos.

More than 150 million people a year visit zoos and aquariums in the United States. Why do we flock to them? It’s not just a pleasant outing with family or friends, or to introduce children (whose lives are a cavalcade of animal images) to real animals, though those are still big reasons. I think people are also drawn to a special stripe of innocence they hope to find there.