Nine thousand scientists from 43 nations signed a petition to ban nuclear testing.
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Serial killer Jeffrey Dahmer changed his plea from not guilty to guilty but insane.
German composer Richard Wagner completed 'Parsifal' – one of his most famous operas.
Instruments used to observe Venus found two-thirds of the planet's southern hemisphere brightened after aerosols were triggered on an 'astronomical' scale.
Center left-wing Independent Labour Party was formed in Britain with Keir Hardie as the leader.
A meteorite that landed in Australia in the 1960s revealed stardust up to 7 billion years old.
