What causes headaches? – Dan Kwartler

Download a free audiobook and support TED-Ed’s nonprofit mission: https://adbl.co/2Hejwql Check out Oliver Sacks’s “The Man Who Mistook His Wife for a Hat”: http://bit.ly/2Hk8ShM View full lesson: https://ed.ted.com/lessons/what-causes-headaches-dan-kwartler In ancient Greece, the best-known remedy for a long-standing headache was to drill a small hole in the skull to drain supposedly infected blood. Fortunately, doctors today […]

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