Chris Scarre is Professor of Archaeology at the University of Durham and a specialist in the later prehistory of western Europe. His research interests include the relationship of prehistoric monuments to their landscape setting and the use of colour and sound in prehistoric societies. Recent publications include Monuments and Landscape in Atlantic Europe (ed) (2002) and The Human Past (ed) (2005). Dr Graeme Lawson has played a leading role in the developing archaeology of acoustical behaviours, focussing especially on the nature and origins of music tradition and on experiment as a means of evaluating ancient acoustic structures.