<human>:  How many species of humans are there?
<bot>: There are about 5,000 species of humans, but the number is still increasing. Humans are a species of primate that is part of the great apes, which are a group of mammals that includes chimpanzees, gorillas, and orangutans. Humans and chimpanzees are our closest relatives. Humans and chimpanzees split from a common ancestor about 7 million years ago.