In addition to all of these strange features listed in the article, they're also the only poikilothermic mammal. Most of the time their body temperature is not regulated and it changes with the environment. But unlike reptiles or fish, if the outside temperature goes too high or too low, naked mole rats can switch back to normal homeothermic behavior and self-regulate the body temperature as needed. This way they can survive extreme conditions, and still when conditions are right they can save a lot of energy and survive long periods of hunger without going into hibernation.