1. In 1935, the largest hailstone ever recorded in the United States fell in Aurora, Kansas. It measured 17.5 inches in circumference and weighed 1.5 pounds.

2. On June 25, 1838, the first steamboat arrived in Kansas on the Kansas River. The boat was called the Maid of the Mississippi and had traveled up the Mississippi and Missouri Rivers before reaching Kansas.

3. In 1946, the first United World College (UWC) was founded in Topeka, Kansas. The UWC is a network of international schools that aims to promote peace and understanding among young people from different countries.

4. On June 25, 1867, the first railroad bridge over the Missouri River was completed in Kansas City, Kansas. The bridge, called the Hannibal Bridge, allowed trains to cross the river and helped connect Kansas to the rest of the country.

5. In 1981, the first flight of an unmanned drone was conducted at the Kansas Cosmosphere and Space Center in Hutchinson, Kansas. The drone was called the Amber and was used for scientific research and reconnaissance purposes.