What causes headaches Dan Kwartler

Download a free audiobook and support TEDEd s nonprofit mission: Check out Oliver Sacks s The Man Who Mistook His Wife for a Hat : View full lesson: In ancient Greece, the bestknown remedy for a longstanding headache was to drill a small hole in the skull to drain supposedly infected blood. Fortunately, doctors today dont resort to power tools to cure headaches, but we still have a lot to lear