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How to Cut Cancer
The World Cancer Research Fund reported the findings of the largest-ever study of diet and cancer this week. Professor Michael Marmott, chairman of the working group that conducted the research, explains how they reached their conclusions.
Geoff talks to Professor Jonathan Sterne about the difficulties in interpreting such studies.

Tracking Wild Fires
Geoff visits the University of Leicester to learn the art of fire-watching.

Race and Genetics
This week James Watson resigned after the furore surrounding his remarks about race and intelligence. Writer Kenan Malik gives his opinion on the difficulties of linking race to genetics.

Ants and Adhesive
What makes ants stick? And can learning this improve human technologies? Anna Lacey investigates.