Most people would already describe someone who knows multiple languages as a smart person, but there's new research that shows learning and knowing more than one language can have a deeper impact on the way your brain works than previously believed. In reality, people who know multiple languages are able to monitor their surroundings better and switch between mental tasks faster, and those benefits extend from the early years to old age—and you can harness them even later in life by picking up a new language. More »