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As with much advice from pediatricians, when it comes to keeping screen time in check, prevention is better than cure, Dr. Dimitri Christakis said March 18.

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WASHINGTON — The Supreme Court is considering whether police may search cellphones found on people they arrest without first getting a warrant.

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SAN FRANCISCO — The digital domain is creeping off our desktops and onto our bodies, from music players that match your tunes to your heart beat, to mood sweaters that change color depending on your emotional state — blue for calm, red for angry. There are vacuum shoes that clean the floor while you walk and fitness bracelets, anklets and necklaces to track your calorie burning.