Technology

How Vine Settled On 6 Seconds

According to numbers released Tuesday, Twitter's one-year-old video-sharing app Vine now has about 40 million registered users. The app lets users shoot a maximum of six seconds per Vine, so we wanted to know why the limit's set at six seconds and not a second longer.

Teens Use Twitter To Thumb Rides

Need a ride to the party or the concert? Instead of making endless phone calls, these days teens turn to social media to arrange transportation. It's called ridesharing, a form of cyber-hitchhiking used by a generation that isn't rushing to get a driver's license or dream car.

Hitting The Road Without A Driver

Engineers at Carnegie Mellon University are developing the ultimate in automotive sophistication: the driverless car. When NPR's Brian Naylor went there to check it out, he thought he'd be going for a spin on a test track. Instead, the car drove itself through suburbia.