<human>:  When did the first humans live?
<bot>: The first humans lived between 200,000 and 100,000 years ago. Humans are a species of primate that evolved from the earliest primates that lived between 20 and 30 million years ago. The earliest primates are known as the prosimians. The earliest primates were small, nocturnal creatures that lived in trees. These primates are sometimes called lemurs, lorises, or bush babies.