Pittsburgh Zoo unveils polar bear home

Two polar bears at the Pittsburgh Zoo & PPG Aquarium should be resting easier these days. The zoo has unveiled a $14 million exhibit for the animals that includes a waterfall, a freshwater stream and a 150,000-gallon pool chilled to between 50 and 55 degrees. It also features a yard where they can play or nap.

The bears even have an air-conditioned cave, with a viewing window for visitors to peer inside. "The colder, the better," said Amos Morris, curator of mammals at the zoo.