A Stanford researcher is pioneering a dramatic shift in how we treat depression -- and you can try her new tool right now

Depression is the leading disability worldwide, and it can kill. Nevertheless, scientists know surprisingly little about it. We do know, however, that talking seems to help -- especially under the guidance of a licensed mental health professional. But therapy is expensive, inconvenient, and often hard to approach. A recent estimate suggests that of the roughly one in five Americans suffering from mental illness, close to two thirds have gone at least a year without treatment.