Galileo Galilei discovered Callisto, the fourth moon of Jupiter.
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Nine thousand scientists from 43 nations signed a petition to ban nuclear testing.
Instruments used to observe Venus found two-thirds of the planet's southern hemisphere brightened after aerosols were triggered on an 'astronomical' scale.
Serial killer Jeffrey Dahmer changed his plea from not guilty to guilty but insane.
A meteorite that landed in Australia in the 1960s revealed stardust up to 7 billion years old.
Industrialist Henry Ford's method to construct auto bodies from plastic was patented.
