Sleep

For such an ordinary habit, sleeping beside a charging phone carries an outsized load of anxiety. One camp warns you…

Almost every culture on Earth has a version of the warning. Do not go to bed with wet hair, or…

An emperor penguin settles onto the Antarctic ice in the dead of winter. The air is at minus 50°C, the…

Sleep is the one universal no animal can skip, yet its budget varies more wildly than almost any other behavior…

A sparrow naps on a twig in a gusty wind, ten meters up, utterly safe. A toddler in a wide,…

You have seen the contrast in every nature documentary. A bird at the water’s edge snaps from asleep to airborne…

A black bear settles into its den in November and does not eat, drink, urinate, or defecate until spring. For…

The wet pillow is one of life’s small embarrassments. You wake up, feel the damp patch, and wonder whether something…

Most of the sleep conversation in the world is about one problem: not getting enough. Insomnia makes its sufferers watch…

For years, health advice has treated them as separate battles: get your steps in, and separately, get your eight hours.…