Brown-polar hybrid bears may be a result of climate change, herd formations help caribou avoid mosquitos, data system connects animals from different zoos for captive breeding, and fluoride keeps sharks cavity-free.

Black skin, blubber, and a coat of clear tubes. Facts and stats to better know a polar bear.

A storm sets in. When the ocean freezes over, polar bears head out on the pack ice to hunt. Watch video.

Genetically-modified apple doesn't brown when bruised or cut, whales may have the ability to block out noise pollution, biodiversity researcher develops mathematical formula to count number of species on earth, and French cow's diet includes fine wine.

Ecologist Chris Morgan observes a family of black bears that live in Anchorage, Alaska's urban mecca. Watch video from Bears of the Last Frontier: The Road North.

Chris Morgan explores the world of black bears caught in the crossroads of urban development in Anchorage and the wilderness. Watch the full second hour of the Bears of the Last Frontier series.

Efforts to get an orangutan to quit smoking, new species of frog named after Prince Charles, Floridians protest release of genetically-modified mosquito, fruit flies learn arithmetic, and yet another feathered-dinosaur find.

We are proud to announce that 3 PBS Nature films have been nominated for a total of 5 Emmys!

A black bear is relocated from the streets of Anchorage to the greener, more bear-friendly surroundings of Chugach State Park. Watch video from Bears of the Last Frontier: The Road North.

Chris Morgan sets up camp alongside the largest concentration of grizzlies in the world. Hour one of the three-part Bears of the Last Frontier series.