The naked mole-rat (Heterocephalus glaber), also known as the sand puppy or desert mole rat, is a burrowing blesmol native to parts of East Africa and is the only species currently classified in the genus Heterocephalus. The naked mole-rat and the Damaraland mole-rat are the only known eusocial mammals. It has a highly unusual set of physical traits that enable it to thrive in an otherwise harsh underground environment; it is the only mammalian thermoconformer. (A thermoconforming organism adopts the surrounding temperature as its own body temperature, thus avoiding the need for internal thermoregulation).