1. In 1864, Idaho's territorial legislature authorized the creation of Idaho County. It would go on to become the largest county in the state, encompassing over 8,500 square miles.

2. On January 21, 1891, the famous outlaw Harry Orchard was captured in Denver, Colorado. Orchard would later testify against labor leader Big Bill Haywood in the controversial trial of the "Idaho Dynamite Conspiracy."

3. In 1922, Idaho's first radio station, KFAU, began broadcasting in Moscow. The station was affiliated with the University of Idaho and was known for its educational programming.

4. On January 21, 1937, the Teton Dam site on the Snake River was selected by the Bureau of Reclamation for a major construction project. The dam would ultimately fail in 1976, causing widespread damage and loss of life.

5. In 1999, Idaho Governor Dirk Kempthorne signed a bill designating the star garnet as the official state gemstone. Idaho is one of the few places in the world where star garnets can be found, and they are highly prized by collectors and jewelry makers.