Read the following extract from the source below as quickly as possible. It will only be displayed on your screen for 30 seconds. After you have read the text, move on to the Next Page and try to answer a few questions about it.
Marshall, G., Gamble, C., Roe, D. & Dupplaw, D. 2002. Lower Palaeolithic technology, raw material and population ecology. http://ads.ahds.ac.uk/catalogue/specColl/bifaces/overview.cfm (19-11-2003)