According to a survey, the average American heads to bed at 10.36pm, falling asleep 42 minutes later. Many younger people opt for lights out at 9pm. Are they all missing out on uplifting and restorative late-night fun?

Name: Bedtime.

Age: Bedtimes vary depending on how old you are, so if you’re a newborn …

A very clever, early-developing, Guardian-reading newborn. If you were a newborn, you wouldn’t really have a bedtime; you’d sleep in bursts of a couple of hours, night and day.

They do need a lot of rest. But this is about adults – and a new study.