Sleep Technology

A Comparative Study of Sleep in Three Contemporary Pre-Industrial Societies Recent anthropological findings are shedding new light on the question how much sleep humans intrinsically need each night. Dr. Jerome Siegel and his team from the Semel Institute of Neuroscience and Human Behavior at U.C.L.A., studied three pre-industrial traditional hunter-gatherer societies: the Hadza of Tanzania, the San of Namibia, and the Tsimane of Bolivia. These three groups represent the whole spectrum of human migration, and quite possibly evolution.