Here’s a look at some interesting events that took place on this day in history:

1818: Illinois becomes the 21st U.S. state (more info)

1964: Police arrest over 800 students at the University of California-Berkeley following their takeover and sit-in at the administration building to demonstrate against the regents' decision to forbid protests on U.C. property (more info)

1967: Dr. Christiaan Barnard performs the world's first successful human heart transplant (more info)

1979: In Cincinnati, Ohio, 11 fans are suffocated in a crush for seats on the concourse outside Riverfront Coliseum before a concert by The Who (more info)

1984: A cloud of deadly poison gas leaks from the Union Carbide plant in Bhopal, India, killing over 4,000 people (more info)