1. In 1925, the famous American author and humorist Mark Twain's birthplace in Florida, Missouri was dedicated as a state park. The ceremony was presided over by Ohioan Claude A. Phillips, who was then the president of the Ohio Mark Twain Society.

2. On November 28, 1916, the Native American Football Association (NAFA) was established in Ohio, with the goal of promoting football among Native American athletes. The NAFA eventually evolved into the National Football League (NFL).

3. In 1977, four nurses were brutally murdered in a quiet Ohio town, causing a shockwave of fear and anxiety throughout the state. The case remained unsolved for many years until DNA evidence led to the arrest and conviction of a suspect in 2009.

4. In 2008, the first-ever pop-up museum in the United States was opened in Columbus, Ohio. Called the "24-Hour Museum," the completely free exhibit displayed a variety of art, historical artifacts and other curiosities for one day only.

5. In 2016, Ohio made history by becoming the first state to allow self-driving trucks to drive on public roads. The innovative technology was developed by the Columbus-based startup SmartTruck, which uses laser sensors and artificial intelligence to navigate highways and avoid obstacles.