1. Nebraska became the 37th state to join the Union on December 10, 1867. The state was formed out of the Nebraska Territory, which had been established in 1854. Nebraska's admission to the Union was the result of the efforts of its largely Republican population to secure statehood and representation in Congress.

2. On December 10, 1941, the Nebraska State Penitentiary in Lincoln was the site of the largest prison riot in the state's history. The riot began when a group of prisoners overpowered guards and seized control of the prison's cellblock. The riot lasted for several hours and resulted in the deaths of four inmates and a guard.

3. December 10, 1927 was the date of what is known as the "Potato Day Massacre" in Omaha. The incident occurred during a labor strike when police opened fire on a crowd of protesters who were marching to demand higher wages and better working conditions for potato harvesters. Sixteen people were killed and dozens more were injured in the attack.

4. On December 10, 1975, Nebraska native and former U.S. Senator Roman Hruska passed away. Hruska was a prominent politician who served in the Senate from 1955 to 1976. He was known for his conservative views and his outspoken defense of businesses and corporations.

5. December 10, 1887 was the day that the Nebraska State Journal newspaper published a story announcing the discovery of a new kind of animal. The animal was later dubbed the "Nebraska Man" and was believed to provide evidence of human evolution. However, subsequent investigations revealed that the fossilized remains that had been found were actually those of a prehistoric pig.