1. In 1979, the deadliest tornado outbreak in Oklahoma history occurred on May 25th. Known as the "Red River Valley Tornado Outbreak," it caused 54 deaths and numerous injuries across the state.

2. On May 25th, 1891, the territorial legislature passed a law establishing the University of Oklahoma at Norman. The university opened its doors in 1892 and has since become a leading institution of higher education in the state.

3. In 1988, the Oklahoma City Zoo and Botanical Garden opened the state's first indoor rainforest exhibit, the "Rainforest Adventure." The exhibit features a variety of exotic plants and animals from around the world, including monkeys, birds, and reptiles.

4. On May 25th, 2018, the Oklahoma State Capitol celebrated its 100th anniversary. The building, which houses the state's executive and legislative branches, was originally completed in 1917 and underwent a major renovation in the early 2000s.

5. In 1961, astronaut Owen Garriott became the first Oklahoman to travel to space. Garriott, who was born in Enid, flew aboard NASA's Skylab space station in 1973 and later flew on the Space Shuttle. He passed away in 2019 at the age of 88.