In a typical day your mind is probably all over the place, worrying about your next appointment or what's for dinner. That's making you unhappy, according to a new study.

Harvard University researchers Matthew Killingsworth and Daniel Gilbert found that about 47 percent of people's waking hours are spent doing anything except being in the moment and focusing on the current activity.

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How your brain does all the things it does is still mysterious, and scientists are learning more all the time about everything from crime to memory to language. Here's what's new this week:

Brain injury 'more likely' in young offenders
Childhood wounds may have worse effects than you think. British researchers find that traumatic brain injury in children could play a role in subsequent crime, especially in people already susceptible to crime. A study found that this could raise the likelihood that they will repeat offenses. This may be because injury to the brain can result in behavior, memory, and attention problems. The BBC reports on this study in Neuropsychological Rehabilitation.

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