rodent
Rodents, members of Rodentia, are an order of mammals characterized by a single pair of continuously growing incisors in each of the upper and lower jaws. About 40% of all mammals are rodents, and they are the most diversified mammalian order, living in a variety of habitats, including human-made environments. Their distinguishing incisors do not stop growing, so the animal must continue to wear them down so that…
