Why you might not need eight hours of sleepTo play this video you need to enable JavaScript in your browser.This video can not be playedWhy you might not need eight hours of sleepCloseListen to the full episode on BBC Sounds.SectionNewsPublished23 AprilShareclose panelShare pageCopy linkAbout sharingRelated topicsSleepFollow Sleepclose panelYou are now following SleepUpdates from your News topics will appear in My News and in a collection on the News homepage.Read description