Why sleep is so important: Prof. Dr. Matthew Walker, Director of the Sleep Laboratory at UC Berkeley, shares his groundbreaking research findings and illustrates the enormous impact of a good night's rest. After all, sleep is one of the most important yet underrated aspects of a healthy, long and happy life. Proper sleep makes us smarter, more attractive, slimmer, prevents cancer and dementia, strengthens the immune system and reduces the risk of heart attacks and diabetes. The international bestseller - translation rights sold in 30 countries!...