Snow, the 17-year-old polar bear who died Labor Day at the Reid Park Zoo, suffered from an undiagnosed heart ailment, a zoo official announced last week at the same time ...

It's a pretty risky business trying to take a blood sample from a polar bear—one of the most dangerous predators on the ...

The San Francisco Zoo, a beloved but crumbling seaside Art Deco treasure, is in trouble and facing controversies that could ...