Korea is one of the most tired nations on earth, people work longer and sleep fewer hours than almost anywhere else. As a result combating sleeplessness has become big business. Show more
Discover 11,128,835 listings and 278,061 playable programmes from the BBC
Korea is one of the most tired nations on earth, people work longer and sleep fewer hours than almost anywhere else. As a result combating sleeplessness has become big business. Show more
The BBC's international radio station
