The Wonderfully Weird Naked Mole Rat. Naked Mole Rats, also known as sand puppies, are small rodents growing no bigger than 4 inches long. Perfectly adapted to its environment, the naked mole rat has been mocked for years due to its unusual appearance. Did you know that they behave like insects? Burrowing in a nest with a Queen at the helm of the colony? Or that they have tiny ears and eyes so that they can avoid getting sand in them? Much of this was unknown until a biologist called Rosie Koch decided to dedicate her PHD in studying these incredible animals.