1. The Treaty of Neah Bay was signed on April 8, 1855, between the United States government and the Makah Indian Tribe. The treaty established the Makah Indian Reservation and granted the tribe fishing and hunting rights in their traditional territory.

2. On April 8, 1910, the Washington State legislature established the Bureau of Mines and Geology. The bureau was tasked with researching and reporting on the state's mineral resources and geological formations.

3. In 1974, Hank Aaron hit his 715th career home run on April 8 while playing against the Los Angeles Dodgers at Atlanta Stadium. The home run broke Babe Ruth's long-standing record of 714 home runs, making Hank Aaron the new all-time home run leader.

4. The Space Needle, an iconic landmark of Seattle, was opened to the public on April 8, 1962, on the first day of the World's Fair. The needle, which stands 605 feet tall, offers panoramic views of the city and surrounding area.

5. The first-ever Boeing 737 aircraft took its maiden flight on April 8, 1967, from Boeing Field in Seattle. The plane, which was designed as a short- to medium-range passenger jet, quickly became one of the most popular airliners in the world, with over 10,000 planes produced to date.