Beauty sleep

Beauty sleep is a real thing, research shows

A couple of bad nights is enough to make a person look "significantly" more ugly, their sleep experiments suggest.

Dark-circled "panda" eyes and puffy lids can even put others off socialising with you, they say.

People were rated by strangers as less healthy and approachable when they had tired faces.

The experiment

The researchers asked 25 university students, some male and some female, to be the guinea pigs in their sleep experiment.