Toggling back and forth between two languages is like doing P90x for your brain.
Looking for a reason to splurge on some Rosetta Stone DVDs? It turns out that being bilingual is actually really good for your brain. For the past 40 years cognitive neuroscientist Ellen Bialystok has studied the effects of knowing two languages on the mind. It turns out that all that translating back and forth in your head is some serious exercise for the brain's synapses.