n The Time of Our Lives. Now that we know where our biological clocks are located, can we learn to control them? The newly discovered mechanisms underlying our 24-hour body rhythms could hold the key to shifting hunger pangs, altering the time when a baby is born or reducing the risk of an early-morning heart attack. Peter Evans examines the fast-moving field of chronobiology. Producer Adrian Washbourne. E-MAIL: scirad@bbc.co.uk