If scientists could figure out what these people do differently it might, they hope, provide insight into sleep’s very nature. “The bottom line is, we don’t understand what sleep is ...

Pharmaceuticals and vector-control programmes have greatly diminished the once-widespread disease, but sustained effort will ...

“We speculated that therefore the opposite may also be true—that good sleep increases people’s ability to emotionally regulate and effectively deal with stress. In other words, we thought ...