Mobile apps work best when they make it simple to efficiently scan and consume information, often while walking, talking or "paying attention" in meetings.

CNN: Twitter pushes content front and center with app updates

He asked them to perform, in their dreams, a simple action whose neurological traces in a brain scan are well understood.

ECONOMIST: Reading the brain

The simple way to search for such genes would be to gather thousands of patients with disease and scan through all ten million places where humans differ by a single DNA letter, comparing the results to thousands of healthy control patients.

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