Naps at work, second sleeps and shared bedrooms: How culture affects sleep:
-- "The family I lived with practiced co-sleeping as well as a greater integration of sleeping and waking activity, with string beds placed outside the house so members of the family could lie down or nap on them while various activities household activities went on around them," Dr Glaskin said.
-- The next time you feel a swell of anxiety about whether you're sleeping the way you "should", take a deep breath and remind yourself there's an enormous variety of sleep patterns experienced by the 7.4 billion people across the planet.
1. expert in doing something because of long experience;
2. skillful in something as a result of experience.
1. a situation in which sth increase in size, number, strength, etc.