June 30, 1972 –
The sci-fi film Conquest of the Planet of the Apes, the third sequel in the Planet of the Apes oeuvre, directed by J. Lee Thompson and starring Roddy McDowall, was released in U.S. theatres on this date.
In the film (set in 1991), the apes were enslaved after a plague brought back from space wiped out all of the Earth’s cats and dogs a decade earlier before the events portrayed. In 1978, six years after the film’s release, there was a worldwide pandemic of canine papillomavirus (a disease not known until then) that killed several thousands of dogs.
(To celebrate the premiere of the film, the world added a leap second to UTC (Coordinated Universal Time) time system for the first time.)
The Haus of Dcaligari 