Mortality as Morality, Cont'd

Eleven days ago, we questioned whether it might be immoral to keep certain animals captive in zoos. Our hunch is that a species' ability to thrive in a zoo is based not only on its physical needs, but also its intelligence—animals who become aware of the limits of their existence will certainly suffer psychological stresses that can lead to early demises, or so our random thesis goes.

We'd like to pick this thread back up today by looking at one of the most intelligent animals ever held captive f