Why we used to sleep in two segments – and how the modern shift changed our sense of time
Albert Joseph Moore/Shutterstock Continuous sleep is a modern habit, not an evolutionary constant, which helps explain why many of us still wake at 3am and wonder if something’s wrong. It might help to know that this is a deeply human experience. For most of human history, a continuous eight-hour snooze was not the norm. Instead, […]
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