Obstructive sleep apnea, often referred to as OSA, is characterised by loud snoring that occurs before a person stops breathing and is a condition that causes the throats of sufferers to close up while they sleep, meaning their brain has to continually wake them up from a deep sleep in order to reopen the throat muscles. Watch this BBC NEWS fil...

Sleep-deprived workers are costing the world economy billions every year and those involved also face a much higher risk of an earlier death as a result.  The calculation is based on tired employees being less productive or absent from work altogether says a new study of 62,000 workers. The study evaluated the economic cost of insufficient sl...