They walk among us, endowed with a superpower invisible to the naked eye. Before an important early meeting, they never have to forgo a shower and settle for dry shampoo and a baby wipe. They rarely wake with a jolt at 10 in the morning and stare groggily at a phone screen with five missed calls and texts that say, “You on your way? ETA?”
They are people who wake up early—naturally. Not just “early” in the sense of a perky-at-8-a.m. spouse. These are the people whose bodies rouse them at 5:30 a.m. or earlier—some even at hours others are just going to sleep. And new research a decade in the making suggests that the extremely early risers among us might be more common than anyone expected.
More here – The Atlantic