1. On September 24, 1869, the first Wyoming Territorial Legislature met in Cheyenne. This assembly established the framework for Wyoming's government and judiciary system, ultimately leading to the state's admission to the Union in 1890.

2. In 1906, a team of University of Wyoming scientists led by Wilbur Knight discovered the first Triceratops fossils in the Hell Creek Formation. This finding helped shape our understanding of dinosaur evolution and the prehistoric landscape of the American West.

3. On September 24, 1914, the town of Sheridan officially opened the Trail End State Historic Site, the former home of Wyoming Gov. John B. Kendrick. Today, the site features a museum and exhibits showcasing the state's history and cultural heritage.

4. In 1937, the town of Thermopolis unveiled its famous "World's Largest Mineral Hot Springs." The springs, which can reach temperatures up to 135 degrees Fahrenheit, contain more than a quarter of a billion gallons of mineral-rich water.

5. On September 24, 1988, Wyoming's first national park, Yellowstone, celebrated its centennial anniversary. Established in 1872, Yellowstone is home to over 300 geysers and hot springs, as well as incredible wildlife and natural wonders such as Old Faithful and the Grand Canyon of the Yellowstone.