Extreme climatic events as drivers of early human behaviour in Africa?

In this seminar for the Institute of Cognitive and Evolutionary Anthropology, Sallie Burrough of Oxford University's School of Geography and the Environment presents an environmental perspective from the Kalahari Desert (23/11/11). Creative Commons Attribution-Non-Commercial-Share Alike 2.0 UK: England & Wales; http://creativecommons.org/licenses/by-nc-sa/2.0/uk/