Temperature scales, heat transfer and air pressure

Living things meet extreme temperatures with adaptations. The wood frog survives winter partly frozen: its breathing and heartbeat stop, and the glucose stored in its organs works as an antifreeze, so ice does not grow inside its cells. It does not die and come back; it survives a partial freeze. The icefish of the cold waters near Antarctica has antifreeze proteins in its blood and, unusually, no haemoglobin; it takes oxygen straight from the water (extra: cold water holds more dissolved oxygen). In the heat, the thorny devil lizard of dry deserts has tiny channels in its skin that collect moisture from air or sand and lead it to its mouth. These three show different answers to the same problem: keep the cells working in an extreme habitat. The icefish is a living fish, not a fish made of ice.