Nylon Toothbrushes
Nylon was patented in the United States in 1937. Wallace H. Carothers, an employee of DuPont, patented the amazing synthetic polymer. One of the first applications was to replace hog-bristle toothbrushes with nylon-bristle toothbrushes. Children could view the patent at: Nylon Patent.
South Pole Telescope saw first light in 2007. Scientists using the ten-foot diameter radio telescope are seeking data regarding the history of the universe, dark energy, and galaxy clusters. The radio telescope is located on a South Pole plateau two miles above sea level. The air there is so dry that the area is desert-like. Older children can learn more at an excellent site: South Pole Telescope.