"Blubber" is a thick layer of fat found in certain animals, particularly marine mammals like whales and seals. This fat serves several important functions, including insulation to keep the animal warm in cold water and energy storage for times when food is scarce. In addition to its biological role, blubber is also used by humans for various purposes. Historically, it has been harvested for oil, which was used in lamps and as a lubricant. Today, blubber is studied in scientific research to understand the adaptations of marine life to their environments.