** THE SUNDAY TIMES BESTSELLER ** GIVE THEM THE GIFT OF A GOOD NIGHT'S SLEEP WITH THIS GUIDE TO THE SCIENCE OF THE BODY CLOCK! 'A superlative guide to some of the most intriguing questions of human existence' Bill Bryson 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. New science has proven that living out of sync with this clock is not only disrupting our sleep, but leaving us more vulnerable to infection, cancer, obesity, type 2 diabetes, heart disease and mental illness. 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 studyi