The evidence shows that Homo sapiens evolved in Africa 100,000 to 200,000 years ago. At that time, the world was in an ice age, and Africa was a desert. But as archaeologica sites dating to that time period are rare in Africa, palaeonthologist Curtis Marean looked at different information. He studied geologic formations, the sea currents, climate data and much more. As a result, he was able to pinpoint his research to destinations like the Pinnacle Point cave, where the findings have been made.