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A new study that the origin of modern humans is in Botswana. The study is in the journal 'Nature'. Researchers in the study said they DNA to out where modern humans came from. The researchers we all have roots in a region of northern Botswana, south of the Zambezi River. Humans were there 200,000 years ago. They there for at least 70,000 years before they around the African continent. They then started to what is now Europe and Asia. Researcher Professor Vanessa Hayes, from the University of Sydney in Australia, said: "We've for a long time that modern humans in Africa roughly 200,000 years ago."

The researchers an area called Okavango as the place we come from. There used to be a huge lake there but it is now salt flats. The people access to water, hunting and farmland. Scientists DNA samples from 200 people who near the area today. They are from the Khoisan people. The Khoisan now live in modern-day South Africa and Namibia. They a lot of DNA called L0, which is the oldest form of DNA to be inside humans. Professor Hayes explained why L0 is important. She said: "Every time a new migration , that migration event is in our [L0 and] DNA as a time-stamp.... Everyone around today...comes from this region."