I think naps are wasted on the young. Not that children don't need them — they definitely do — but with age, sleep becomes more precious. A good night's sleep, taken for granted when I was younger, is ...

In the protective silence of darkness, another world awakens, where night birds reign. Capable of intense nocturnal activity, these people reveal the richness and diversity of life’s rhythms with ...

This story is from The Pulse, a weekly health and science podcast. Find it on Apple Podcasts, Spotify, or wherever you get your podcasts. In general, our circadian rhythms are governed by the ...