1925 The Isolator is a bizarre helmet invented in 1925 that encourages focus and concentration by rendering the wearer deaf, piping them full of oxygen, and limiting their vision to a tiny horizontal slit. The Isolator was invented by Hugo Gernsback,.
George Washington's Dentures - Despite legends, none of them would be made from wood. They were carved from hippopotamus and elephant ivory. Sometimes the teeth were set in gold. His dentures had gold springs to hold the upper and lower teeth together.