60 SECONDS

摘要

Getting a good nights sleep is key to looking attractive, according to a study at the Karolinska Institute in Sweden. Observers judged the faces of 23 sleep-deprived subjects as less healthy and less attractive than photos of the same people taken after a normal nights rest (BMJ, DOI: 10.1136/bmj.c6614). A newly identified chemical can lengthen the biological clocks of zebraf ish by more than 10 hours. Dubbed "longdaysin", it targets three enzymes which act together to alter circadian rhythms. The discovery could aid development of drugs for sleeping disorders and jet lag.