Barry Cunliffe : Facing The Sea Of Sand - the Sahara and the peoples of Northern Africa

Emeritus Professor Sir Barry Cunliffe is an academic archaeologist who writes enthusiastically and engagingly about his passions. In this interview he talks to me about his book which tells the whole of African human history focussing on the Sahara. Sir Barry takes the story of us from our evolution through to the present day. Is he optimistic about our survival?