1. On March 21, 1968, the first Ford Mustang Cobra Jet was introduced at the NHRA Winternationals in California. The car, equipped with a 428 cubic inch V8 engine, quickly became popular in drag racing circuits across the country.

2. In 1866, the Michigan Senate approved a bill to establish the Agricultural College of the State of Michigan, which would eventually become Michigan State University. The school was founded to provide practical education in agricultural and mechanical subjects.

3. On March 21, 1928, the Michigan State Police was established. The force was created to provide statewide law enforcement services and investigate major crimes. Today, the Michigan State Police has over 2,600 uniformed officers and operates 29 posts throughout the state.

4. In 1949, the Michigan State Housing Development Authority was established to promote the development of affordable housing in the state. The organization provides a variety of programs and services to help low-income families and individuals find and maintain safe and affordable housing.

5. On March 21, 2015, Michigan State University's men's basketball team advanced to the Final Four for the seventh time in school history by defeating the Louisville Cardinals in the Elite Eight of the NCAA Tournament. The team went on to play Duke University in the semi-final game, but ultimately lost.