Naked mole-rats are weirdly spectacular – they are bare-skinned, wrinkly and buck-toothed, and they live in large underground colonies in East Africa where only the queen breeds, with a few selected males. Even more spectacular is that research has shown that naked mole-rats do not age in the same manner as other mammals, and in fact show little to no signs of ageing, and their risk of death does not increase with age.