Why We Sleep: The New Science of Sleep and Dreams

by Matthew Walker

bridge between despair and hope is a good night’s sleep.”

the shorter your sleep, the shorter your life.

a sleep-deprived body will cry famine in the midst of plenty.

Inadequate sleep is the perfect recipe for obesity: greater calorie intake, lower calorie expenditure.

One distinction separates insomnia into two kinds. The first is sleep onset insomnia, which is difficulty falling asleep. The second is sleep maintenance insomnia, or difficulty staying asleep.

going to bed and waking up at the same time of day no matter what.