Nancy Shute

Researchers at Dartmouth College recently found high levels of arsenic in rice. Particularly high amounts were found in brown rice syrup — a sugar substitute used in foods aimed at young children.

The science may not be perfect, but a prominent sleep researcher says she and her colleagues have a pretty good handle on how much sleep kids need. She defends the field against a study that claimed the experts haven't even had a clue.

People who work long hours are more likely to become depressed, even if they're working in the executive suite. That's according to a study of British civil servants. Other studies have found that people with higher incomes are less vulnerable to depression, but they didn't factor in work hours.

Social scientists say three things matter for success in life: IQ, family's socioeconomic status and one thing that's easy to influence: self-control. A child's self-control in preschool helps predict possible health, substance abuse and financial problems later in life, researchers found.