Laura M Holson The New York Times

With myriad electronic ways to socialise, gossip and explore hobbies, tech-addicted teenagers are getting even fewer hours of sleep.

The more than 43,000 Twitter followers of Rosanne Cash, the singer and daughter of Johnny Cash, have come to expect her tart commentary on married life with her husband, John Leventhal, a Grammy-winning musician.

Once forced into hiding by death threats, Salman Rushdie is now an indefatigable presence on the New York social scene.

With myriad electronic ways to socialise, gossip and explore hobbies, tech-addicted teenagers are getting even fewer hours of sleep.

The more than 43,000 Twitter followers of Rosanne Cash, the singer and daughter of Johnny Cash, have come to expect her tart commentary on married life with her husband, John Leventhal, a Grammy-winning musician.

Once forced into hiding by death threats, Salman Rushdie is now an indefatigable presence on the New York social scene.