1. In 1931, Nevada legalized gambling. This decision helped the state to attract tourists, increase revenue, and become known as the "Entertainment Capital of the World."

2. On February 21, 1971, the Las Vegas Convention Center opened its doors. This 3.2 million square foot facility has since hosted numerous trade shows, conventions, and events, attracting visitors and businesses from around the world.

3. Legendary boxer Muhammad Ali fought Jimmy Ellis in a heavyweight championship bout on February 21, 1970, at the Las Vegas Convention Center. Ali won the fight, cementing his status as one of the greatest boxers of all time.

4. The Hoover Dam, which straddles the Nevada-Arizona border, was completed on February 21, 1935. This engineering marvel provides hydroelectric power and water management, playing a critical role in the development of the southwestern United States.

5. On February 21, 1986, the Nevada State Museum in Carson City opened its doors to the public. The museum features exhibits on the geology, wildlife, and cultural history of Nevada, showcasing the state's unique heritage and natural resources.