How long have humans been existed?

Human evolution:

1. Humans evolved in Africa over the last 200,000 years from their most likely common ancestor, Homo erectus, which means "upright man" in Latin.
2. It is an extinct human species that lived between 1.9 million and 135,000 years ago.
3. The 'out of Africa' model and the multi-regional model have been proposed as key models to explain the evolution of humans, primarily Homo sapiens.
4. At the moment, the 'out of Africa' model is the most widely accepted.
5. It contends that Homo sapiens evolved in Africa before migrating across the globe.
6. Between 200,000 and 300,000 years ago, early hominid ancestors of the first modern humans—Homo sapiens—evolved.