Smartphones and tablets can be a big distraction to students, but some schools are embracing these Internet-ready mobile devices as tools for learning. Bring-your-own-device policies have benefits in the classroom, but there are drawbacks, too.
Supporters of the technology say it will save a million lives a year and prevent a global carmageddon. But among the questions still to be worked out: If a self-driving car runs a red light and gets caught, who gets the ticket?
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