The woolly rhinoceros, also known as the Coelodonta antiquitatis, lived during the Pleistocene era and is now extinct. Some synonyms for the woolly rhinoceros include the tundra rhinoceros, northern hairy rhinoceros, and the ice age rhinoceros. These synonyms highlight the animal's adaptability to cold climates and its thick, shaggy coat, which protected it from the frigid temperatures of the Ice Age. The woolly rhinoceros was known for its impressive horns, which could grow up to three feet in length and were used for defense against predators. Today, the remains of woolly rhinoceroses can be found preserved in permafrost throughout Siberia and other northern regions.