Topic
Circadian Rhythm
Circadian Depression's 23% Rests on a Questionnaire, Not a Clock Test
Of 11,380 people in an Australian depression cohort, 2,604 met at least three of six self-reported sleep-and-clock features. The study measured no body clock, and its treatment signal is a modest self-rating of antidepressants.
Why Cold Weather Makes You Sleepy, and Why It's Really the Dark
The drowsiness that arrives every October has more to do with light than temperature, and the warm room may be doing more harm than the cold outside.
Why Some Plants Close Their Leaves Every Night
Plants that fold their leaves at night aren't wilting or sleeping — they're running an evolved, energy-spending routine called nyctinasty.
Social Jet Lag, Explained: Why Weekends Wreck Your Sleep
Seventy percent of people are biologically wired for a sleep schedule the workweek doesn't respect. Social jet lag is what happens when body clock and calendar keep disagreeing.