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 OccupantsWho knew our body clocks determined so much of our health happiness and lifespan I learned so much James Nestor author of Breath In the twentyfirst 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 24hour biological clock which guides us towards the best time to sleep eat and think.In Life Time Professor Russell Foster shares his lifes 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 nights sleep how eating after sundown can affect our weight the extraordinary effects the time we take our medication can have on our risk of lifethreatening conditions such as strokesIn the modern world we have neglected an essential part of our biology.