It's freezing in Chicago and Charlie and Kirby just can't seem to stay warm! So, they've set their sights on some animals who've adapted to arctic temperatures in the hopes that they can pick up some tips for how to stay warm! They're off to Alaska to get a closer look at these curious cold weather critters who have mastered life below zero.

Originally released by National Geographic, 2017. Streaming video file encoded with permission for digital streaming by Infobase on January 05, 2023.