Evolutionmedicine

Why we sleep is not well understood. The study of sleep is one of the last frontiers in human biology. In addition to smoking and bad diet, we can add sleep loss to the list of risk factors for chronic disease. But is modern sleep all that different from that of our ancestors? Joe Alcock, Kate Rusk, Coffee Brown, and Gandhi Yetish explore the mystery of sleep in this Part 2 of our discussion of sleep evolution.