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Leon Kreitzman and Russell Foster

The Rhythms of Life

Hay Festival 2004 , 
Why are people who work anti-social shifts more illness-prone and likely to die younger? What is jet-lag and can anything help? Why do teenagers refuse to get up in the morning, and are the rest of us really 'larks' or 'owls'? Why are most people born (and die) between three and five in the morning? Kreitzman and foster consult the biological clocks.