1. In 1878, the wild west outlaw Tom O'Day robbed a bank in Laramie, Wyoming. The robbery caused a sensation in the town and sparked a massive manhunt that ended with O'Day's capture and eventual imprisonment.

2. In 1927, the Kelly-Hopkinsville encounter occurred in the northeastern part of the state. The encounter involved a group of people who claimed to have been visited by extraterrestrial beings. The incident remains one of the most famous UFO sightings in American history.

3. On October 4, 1956, the University of Wyoming ordered the suspension of a female student who refused to testify before the House Un-American Activities Committee. The incident sparked national controversy and raised questions about academic freedom and First Amendment rights.

4. In 1977, the Wyoming State Penitentiary was destroyed by a massive prison riot. The riot caused extensive damage to the facility and resulted in the deaths of two inmates and one guard.

5. On October 4, 2013, a massive snowstorm hit much of Wyoming, causing widespread power outages and road closures. The storm, which dropped up to a foot of snow in some areas, was one of the earliest and most severe winter storms in the state's history.