Nine thousand scientists from 43 nations signed a petition to ban nuclear testing.
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Center left-wing Independent Labour Party was formed in Britain with Keir Hardie as the leader.
Alfredo Ormando set himself on fire in St. Peter's Square, protesting against the Roman Catholic Church's teaching on homosexuality.
Instruments used to observe Venus found two-thirds of the planet's southern hemisphere brightened after aerosols were triggered on an 'astronomical' scale.
Avezzano earthquake claimed 30,000 lives in Italy.
Walt Disney's Mickey Mouse comic strip was published for the first time.
