Naked Molerats

The naked mole-rat (Heterocephalus glaber), also known as the sand puppy, is a burrowing rodent native to the Horn of Africa and parts of Kenya, notably in Somali regions. It is the only species in the genus Heterocephalus.

The naked mole-rat exhibits a highly unusual set of physiological and behavioural traits that allow it to thrive in a harsh underground environment, most notably its being the only mammalian thermoconformer with an almost entirely ectothermic (cold-blooded) form of body temperature regulation, as well as exhibiting eusociality, a complex social structure including a reproductive division of labour, separation of reproductive and non-reproductive castes, and cooperative care of young. The closely related Damaraland mole-rat (Fukomys damarensis) is the only other known eusocial mammal. Naked mole-rats lack pain sensitivity in their skin, and have very low metabolic and respiratory rates. The animal is also remarkable for its longevity and resistance to cancer and oxygen deprivation.