The Importance of Being Happy in a Zoo

Gus was a polar bear who lived in Central Park Zoo in the 1990s. People started to notice Gus was swimming a lot, like constantly swimming in a figure eight shape. He would swim like that for like 12 hours a day, just over and over and over again. And when he would stop for break, he would turn his attention to people pressing up against the glass,. And I guess he would start to follow them as they paced back and forth near the underwater glass enclosure., almost like he was stalking them.