World-renowned mathematician Sir Roger Penrose, Oxford University, describes how crystalline symmetries are necessarily 2-fold, 3-fold, 4-fold, or 6-fold.

The Future of the Past: Dating archaeology using radiocarbon and particle accelerators

The annual Oxford University Alumni Weekend aims to showcase the Collegiate University as a whole, giving prominence to a range of current research and its application to real world situations, as well as recognising the achievements of Oxford men and women.
This series also includes podcasts from other alumni events including study days and the Oxford European Reunion.

Past themes include "A Global Oxford" (2008), "Equal Citizenship" (2009) and "Shared Treasures" (2010).