Mr. BUCKLEY: (Singing) And I couldn't awake from the nightmare that sucked me in and pulled me under, pulled me under.

NPR: Buckley's Big Voice Built a Loyal Following

It's more like "half-asleep" texting, as doctors describe it as a state of rest where a person isn't fully awake.

CNN: STORY HIGHLIGHTS

These portraits, several of which are in the show, provoke the persistent question: if his sitters can't stay awake for the painter, why should we?

ECONOMIST: Leon Kossoff

He usually works until he can't stay awake.

WSJ: Unlikely NY scribe handwrites Good Book in 4 years

The most interesting finding, however, is that just being awake early and seeing the morning sun isn't what actually makes people happy.

CNN: STORY HIGHLIGHTS

But he noted that "Maggie's Law" doesn't fully solve the problem because prosecutors must show that a driver had been awake for 24 consecutive hours to prove possible recklessness, which is often a difficult proposition.

WSJ: Drowsy driving remains an elusive highway dilemma

Tumbling stock markets, profit margins and the word Nasdaq may keep him awake at night, but the controller of the world's purse strings doesn't do stock markets.

BBC: Greenspan plays it safe