Cell phones, which in the last few years have become full-fledged computers with high-speed internet connections, can make the tiniest windows of time entertaining, and potentially productive. But scientists point to an unanticipated side effect, reports the New York Times: When people keep their brains busy with digital input, they are forfeiting downtime that could allow them to better learn and remember information, or come up with new ideas. At the University of California, San Francisco, scientists have found that when rats have a new experience, like exploring an unfamiliar area, their brains show new patterns of activity. But only...
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