The plastic shirt collar was patented in the US by Walter Hunt.
Source
Metallica released their album 'Kill 'Em All.'
Maximilian II became emperor of the Holy Roman Empire.
The first baby was born after being conceived by in vitro fertilization (IVF).
Italian Fascist Prime Minister Benito Mussolini was removed from office.
An asteroid, dubbed 'City Killer,' came closer to Earth than the moon and was almost undetected.
