How do whales, polar bears or even penguins stay warm? The ocean can be a chilly place, but there are many mammals who call it home! How do some of our favorite mammals live in such cold conditions? It is to do with something called blubber. While you and I don’t need much of it to survive, creatures like polar bears, whales, seals, and penguins definitely do! Test out how blubber works as an insulator.