The 37 acres of surrounding farmland provide insulation from the outside world.

This produces voids that allow the moisture to drain and air space to provide insulation.

Green roofs also provide insulation, keeping homes warm in the winter and cool in the summer, so shaving money off electricity bills.

Thick blubber deposits provide insulation, as well, and blood vessels in the flippers and legs have evolved intricate structures to preserve heat.

A gold film and a layer of silica aerogel provide insulation.