It’s in northern Botswana, south of the Zambezi River.

The  journal Nature publishes the study using mitochondrial DNA – that which is passed down the female line and is not sidetracked by male DNA..

They analyse samples from 1200 people from myriad populations across Africa

The area where modern man began about 200 000 years ago is now salt pans.

It was once an enormous lake supporting a lush wetland.

The finding supports the theory that our modern ancestors migrated out of Africa rather than evolving in separate pockets around the world simultaneously.

The anthropologists’ study is controversial.

Some scientists say mankind cannot be traced back using DNA alone. 

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