(via TEDEd) The year is 1656. Your body is wracked by violent chills. Your head pounds and you're too weak to sit up. In your feverish state, you see a strange-looking man wearing a beak-like mask, ...

The beaked mask wasn’t just for show—it was packed with herbs to ward off “bad air.” Underneath it? One of the most haunting jobs in history. One type of drinking water linked to up to 62% higher ...