One of the most attractive critters at the zoo splashes through frigid waters: polar bears, the beauties of the Arctic Circle. Most humans will never see a polar bear in the wild. So, we have to rely on places like zoos to witness these incredible mammals.

Kali, now 13, was rescued as a cub in 2013 after residents of the Native Village of Point Lay, Alaska, discovered he’d been orphaned.

Yet in the past 12 years, at least 467 species have gone extinct, with most of these creatures — including a type of rodent called the melomy and a Hawaiian tree snail called Achatinella apexfulva — quietly disappearing and utterly unknown to the vast ...

Brookfield Zoo, which has cared for generations of polar bears, hopes to offer guidelines for an area where mothers den at high densities.

A 13-year-old male polar bear has arrived at his new home, the Detroit Zoo, after a trade with the Toledo Zoo.

Watch Koda roll, flop, and carve giant snow angels like the happiest bear on earth.