Will your smartphone be the next doctor’s office?

A phone’s camera lens can measure a heart rate. The microphone, kept by the bedside, can screen for sleep apnea. Even the speaker is being tapped, to monitor breathing. But using smartphones as diagnostic tools is a work in progress, experts say.

The 30 highest-grossing actors under the age of 30

Most of these actors started their careers as children, working in theater, commercials, and television, before landing breakout roles in films and film franchises that would go on to be worldwide hits.