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

1818 – Illinois becomes the 21st US 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 in protest at the UC Regents’ decision to forbid protests on UC 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 Who concert (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)