<human>:  Can you tell me some interesting facts about the rhinoceros?
<bot>: Rhinoceroses are large mammals that live in Africa and Asia. They have two horns made of keratin, the same material that is found in human hair and nails. They are also the closest living relative of the extinct woolly rhinoceros. Despite their massive size, they can run up to 40 miles per hour! They are herbivores with a diet consisting mainly of grasses, leaves, bark, and fruit. Rhinos are also highly social animals, living in small groups of up to 6 individuals. Unfortunately, all five species of rhinoceros are threatened with extinction due to habitat loss and poaching.