2/2. Neuroscientist Dr Mark Lythgoe explores the science behind learning languages. This week he finds out how language controls us, from how we think to how we look. The "stiff upper lip" is not just an expression - some
British accents actually require one. And new research suggests that bilinguals are more creative and better at problem-solving. There are hopes that learning languages in later life could even help delay dementia. Producer Michelle Martin