In the first of a new series, Connie St Louis looks at our changing bodies - are we falling apart? Greying hair, creaking joints and failing eyesight all seem to creep up on us in middle age. What causes these changes and is there anything we can do to prevent them, or at least reduce their impact? EMAIL: radioscience@bbc.co.uk
Producer Pamela Rutherford Repeated tomorrow at 4.30pm How to hold back the years: page 41