There’s a small group of people, who’re night owls and early birds simultaneously. They’re “natural short sleepers.”
For a small group of people—perhaps just 1 to 3 percent of the population—sleep is a waste of time. They typically, turn in well after midnight, then, get up just a few hours later, and barrel through the day without needing to take naps or load up on caffeine.
They’re also energetic, outgoing, optimistic, and ambitious, according to the few researchers who’ve studied them. Benjamin Franklin, Thomas Jefferson and Leonardo da Vinci were too busy to sleep much.