Back to Show
Nature
Invasion of the Killer Whales | Preview
A shift of power is taking place at the top of the world. The polar bear, once king of the North, needs ice to stalk its prey. Killer whales, or orca, on the other hand, are unable to hunt in an ocean locked in ice. As Arctic ice increasingly disappears, the tables have turned. Polar bears are struggling to survive while the now open ocean provides bountiful new hunting grounds for the whales.
Support Provided By
Unlock with PBS Passport
53:10
Ecologist Chris Morgan embarks on a challenge to find and film a wild Siberian tiger.
Unlock with PBS Passport
58:51
One man's remarkable experience of raising a group of wild turkey hatchlings to adulthood.
Unlock with PBS Passport
52:59
Scientists aim to change the public perception of one of Africa's most dangerous snakes.
Unlock with PBS Passport
53:10
Florida's Everglades National Park is home to a growing number of Burmese pythons.
Unlock with PBS Passport
53:10
In Yellowstone National Park, two predators reign supreme: the grizzly bear and the wolf.
Unlock with PBS Passport
53:11
CINE Golden Eagle Award Winner: Hummingbirds spend most of their lives in fast forward.