It's a mystery, but it clearly makes us smarter and healthier.
Boyce
Nell
N
Brink
Susan
S
D000293:Adolescent; D000328:Adult; D002648:Child; D002940:Circadian Rhythm; D015444:Exercise; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012890:Sleep / Q000502:physiology*; D014481:United States