1. In 1907, the Oklahoma state legislature passed a measure declaring the scissor-tailed flycatcher as the state bird of Oklahoma. It is commonly seen in the state during the spring and summer months.

2. On April 26, 1937, an F5 tornado struck the town of Tupelo in northeastern Oklahoma. It was one of the deadliest tornadoes in U.S. history, causing over 200 deaths and injuring nearly 700 people.

3. In 1970, the University of Oklahoma established the School of Meteorology, which is now one of the leading institutions in the world for the study of atmospheric sciences.

4. On April 26, 1984, the Oklahoma City Thunder baseball team played their first-ever game as part of the Texas League. The team was later renamed the Oklahoma City Dodgers.

5. In 2001, the Oklahoma City National Memorial was dedicated to honor the victims of the 1995 Oklahoma City bombing. The memorial features a reflecting pool, 168 empty chairs, and a survivor tree that still stands today.