Children who are ambidextrous, using either hand with the same ease, may be more likely to have mental health, language and academic problems than their peers, according to a new study. The researchers say the findings may help teachers and health professionals identify children who are particularly at risk of developing these problems. The researchers aren't sure what is behind this link, though they suggest differences in the brain between ambidextrous individuals and those who have a dominant hand may play a role. In fact, scientists aren't sure why some people can use both hands equally well (with no dominant...