PastThe Rhinoceros comes from a group of mammals called perissodactyls. The horses and zebras also come from that group. The Rhino is believed to come directly from a huge dinosaur called the Paraceratherium. It evolved into two different branches: the one horned animals and the two horned animals. The Paraceratherium then shrunk and evolved a horn or two horns.
The Rhino evolved a horn to defend itself from other predators and to impress females. Also, it evolved a large upper lip to grab leaves off trees and to eat break branches. It evolved short legs to run faster through the long savannahs.