1. Idaho became a state on December 9, 1890. It was the 43rd state to join the union.
2. On December 9, 1914, the town of Wallace experienced one of the worst fires in its history. The fire destroyed many of the town's buildings and homes.
3. The Idaho State Capitol building was dedicated on December 9, 1920. The building had been under construction for several years and was finally completed on this date.
4. On December 9, 1955, Sun Valley ski resort became the first ski resort in the world to install a chairlift. The chairlift was a revolutionary innovation that transformed skiing for millions of people around the world.
5. In 2006, a new species of dinosaur was discovered in Idaho on December 9. The dinosaur was named Gryposaurus Monumentensis and was one of the last known species of dinosaur to roam the earth.