Scientists have found a way to boost terahertz technology using particles thousands of times smaller than a grain of sand.

Engagement with digital technology was associated with a 58 percent reduced risk of cognitive impairment in people middle-aged and older, according to a study in the journal Nature Human Behavior.

While parents are worrying about the amount of screen time their children are spending on devices such as smart phones and tablets, another group of people might benefit from using technology more — ...