Let me first start by saying that waking up early has made a huge difference in my life. I used to be the complete opposite - late sleeper and late riser. These days, I wake up at 5:30am everyday.
For something that we spend a third of our lives doing (if we’re lucky), sleep is something that we know relatively little about. “Sleep is actually a relatively recent discovery,” says Daniel Gartenberg, a sleep scientist who is currently an assistant adjunct professor in biobehavioral health at Penn State. “Scientists only started looking at sleep...