No one crows louder than the proverbial “early bird”, boasting about their pre-work run to anyone who’ll listen. Night owls, on the other hand, often pride themselves on their bursts of productivity as they burn the midnight oil.
But a new study published in Nature Communications suggests that, rather than just these two camps, there are actually five “subtypes” of sleeper, determined by the parts of the day when people feel most alert or ready to sleep.
