As Africa’s leaders gather in Addis Ababa this weekend for the African Union summit, the continent is engulfed in an escalating security crisis ... from their homes, migration pressures on ...

Here's how early humans spread from East Africa all around the world. Produced by Alex Kuzoian Follow BI Video: On Facebook More from Science It's tough to know what happened on Earth thousands of ...

Professor Leonard Ngcongco, University of Botswana. One theory is that there were waves of migration, one moving through the east of Africa and another making its way through the centre of the ...