Sapiens meets Why We Sleep in an evolutionary romp through the science of sleep--and how we can get better rest--by one of the world's leading sleep scientists. We spend roughly a third of our lives in bed, but for millions of us, not all of that time is spent sleeping. We strive for eight hours per night, only to lie awake thanks to stress, our ever-present devices, a new baby, or that 4pm coffee you thought you needed. As...