DisneyNature gives viewers a look at the life of a polar bear as she grows from a cub to an adult and has a cub of her own in the new documentary “Polar Bear.” The documentary is presented from the perspective of the cub and is narrated by Catherine Keener. The filmmakers present it in a way where the polar bear is remembering the lessons her mother taught her as a cub as she prepares to teach those same lessons to her cub. Polar Bear was released on Earth Day 2022