I was once fond of saying, "sleep is the third pillar of good health, alongside diet and exercise." I have changed my tune. Sleep is more than a pillar; it is the foundation on which the other two health bastions sit. Take away the bedrock of sleep, or weaken it just a little, and careful eating or physical exercise become less than effective, as we shall see.

The natural peak of the human circadian rhythm is in the early afternoon.

For every day you are in a different timezone, your suprachiasmatic nucleus can only readjust by about one hour.

Every time I watch this stunning act of neural synchrony occurring at night in my own research laboratory, I am humbled: sleep is truly an object of awe.

When sleep is abundant, minds flourish. When it is deficient, they don't.

the shorter your sleep, the shorter your life span