This Way Up for Saturday 18 December 2010
We look at the crayfish with Rachel Taulelei, how it develops and how to prepare it.
Roger Cook of the New Zealand Food Safety Authority on how long we should hang on to our Christmas turkey and ham.
Author Deborah Cadbury on the early British chocolate industry and the Quaker business model.
Carey Morewedge of Carnegie Mellon University on his study into how imagining eating food could make you eat less.
Richard Banks of Microsoft on preserving our digital memories for future generations.
Consultant neurologist Dr Paul Timmings on what causes headaches and migraines.
Richard MacManus with the latest applications for monitoring your health. Plus the new Radio New Zealand app.