Professor Russell Foster, a world-leading expert on circadian neuroscience, takes us on a fascinating journey through our days and nights. Using surprising examples and cutting-edge science, he busts long-standing myths about the best daily routine: from how to use light for a better night's sleep to using meal times to supercharge your metabolism, from the optimal time to have sex for conception to the extraordinary effects the time we take medication can have on our risk of life-threatening conditions such as strokes.