Galileo Galilei discovered Callisto, the fourth moon of Jupiter.
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Walt Disney's Mickey Mouse comic strip was published for the first time.
Avezzano earthquake claimed 30,000 lives in Italy.
Center left-wing Independent Labour Party was formed in Britain with Keir Hardie as the leader.
Industrialist Henry Ford's method to construct auto bodies from plastic was patented.
Serial killer Jeffrey Dahmer changed his plea from not guilty to guilty but insane.
