A new dam on the Nile could trigger a war over water - unless Ethiopia can agree a deal with Egypt and Sudan. Join the BBC's Africa correspondent Alastair Leithead and his team, travelling from ...

Among them is a historic map that shows ... with sub-Saharan Africa dwindled. The past few years, however, has seen a dramatic re-engagement, in particular with the Nile Basin countries.

Cheikh Anta Diop argues that: As humankind began in East Africa it was likely that people were black skinned. People populated other continents by moving either through the Sahara or the Nile Valley.