** THE SUNDAY TIMES BESTSELLER ** A GUIDE TO USING THE SCIENCE OF THE BODY CLOCK TO CREATE THE OPTIMUM PERSONAL ROUTINE: SLEEP BETTER; WORK BETTER; FEEL BETTER. 'A superlative guide to some of the most intriguing questions of human existence' - Bill Bryson; author of The Body: A Guide for Occupants 'Who knew our body clocks determined so much of our health; happiness; and lifespan? I learned so much' - James Nestor; author of Breath In the twenty-first century; we increasingly push our daily routines into the night; carrying out work; exercise and our social lives long after dark. But we have forgotten that our bodies are governed by a 24-hour biological clock which guides us towards the best time to sleep; eat and think. In Life Time; Professor Russell Foster shares his life's work; taking us on a fascinating and surprising journey through the science of our body clocks. Using his own studies; as well as insights from an international community of sleep scientists and biologists studying circadian rhythms; he illustrates the surprising effects the time of day can have on our health; including: - how a walk outside at dawn can ensure a better night's sleep - how eating after sundown can affect our weight - the extraordinary effects the time we take our medication can have on our risk of life-threatening conditions; such as strokes In the modern world; we have neglected an essential part of our biology. But with knowledge of this astonishing science; we can get back into the rhythm; and live healthier; sharper lives.