1. On August 20, 1910, a massive forest fire known as the "Big Blowup" ravaged northern Minnesota, destroying many communities and causing hundreds of deaths. This disaster led to major changes in forest management practices in the state.

2. In 1955, on August 20, the Minnesota State Fair set a single-day attendance record with over 212,000 visitors. This record stood for over 20 years.

3. August 20, 1985, was the day that the wreck of the Edmund Fitzgerald, a famous freighter that sank in Lake Superior in 1975, was finally located using advanced sonar technology. The discovery helped shed new light on the circumstances that led to the ship's tragic demise.

4. On August 20, 2007, a tornado touched down in the town of Northfield, causing significant damage to many homes and buildings. Fortunately, no one was seriously injured.

5. Finally, on August 20, 2013, Minnesota's own Prince released his 38th studio album, entitled "Plectrumelectrum". The album was received warmly by fans and critics alike, and helped cement Prince's reputation as one of the most innovative and influential musicians of his era.