All humans on the Earth today - over 6,000,000,000 of us - are homo sapiens. While homo sapiens appear to have emerged 200,000 years ago, in Africa, the population grew slowly and was subject to many setbacks. One such setback about 50,000 years ago or so, reduced the entire population of homo sapiens to just 2,000 individuals! Think about that. We were THAT close to extinction!