This module, together with the final year project, is the culmination of the BSc Archaeology degree. It is taught primarily in a seminar setting and provides students the opportunity to reflect on the practical and interpretative issues they have faced in undertaking their dissertation research. In addition a number of controversies in archaeological science are discussed with the aim of examining how scientific data, although apparently absolute, can have a multiplicity of interpretations each of which might be equally valid. Case studies vary each year but might include the ‘Younger Fill debate’ concerning the interpretation of Late Holocene sediments in the Mediterranean; diffusion models to explain the change from Mesolithic to Neolithic society in Europe; chronologies of colonisation (of for example the Americas and Australia, and of Europe by early forms of Homo and Homo sapiens) and mid-Holocene vegetation change.