1. In 1859, the Comstock Lode was discovered in Virginia City, Nevada. This silver deposit was one of the largest in the world and played a major role in the state's development and economy.

2. On May 4, 1912, the state of Nevada ratified the 17th Amendment to the U.S. Constitution, which established the direct election of U.S. Senators by the people, rather than by state legislatures.

3. The Hoover Dam, one of the most famous landmarks in Nevada and a major source of hydroelectric power, was dedicated on May 4, 1935. The dam stands on the border between Nevada and Arizona and is visited by millions of tourists each year.

4. On May 4, 1959, Nevada became the first state to legalize gambling, paving the way for the development of the famous casinos and resorts that have made Las Vegas a top tourist destination.

5. In 1984, the MGM Grand Hotel and Casino in Las Vegas was devastated by a fire that killed 85 people and injured hundreds more. The tragedy prompted major changes in building codes and safety regulations for hotels and casinos in Nevada and beyond.