There are many different kinds of mole rats. The best known is probably the naked mole rat, whose hairless, tubular, wrinkled body makes it appear a bit like a tiny walrus—or perhaps a bratwurst ...

The Tulsa Zoo has a colony of nearly 30 naked mole rats. The mammals are native to Africa and live almost entirely underground. The zoo has created a similar environment in the WildLife Trek Life ...

The mole rat was one of the first entries into photographer Joel Sartore's Photo Ark, which now has over 6,500 species.