Nine thousand scientists from 43 nations signed a petition to ban nuclear testing.
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A meteorite that landed in Australia in the 1960s revealed stardust up to 7 billion years old.
Walt Disney's Mickey Mouse comic strip was published for the first time.
Avezzano earthquake claimed 30,000 lives in Italy.
The most destructive riot in Constantinople's history, the Nika Riots, began during a chariot race.
Galileo Galilei discovered Callisto, the fourth moon of Jupiter.
