Leonardo da Vinci’s “The Last Supper” was returned to display in Milan after 22 years of restoration.
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Alan Turing submitted his paper 'On Computable Numbers' for publication, in which he set out the hypothetical basis for modern computers.
The Sierra Club was formed.
NASA tested the Saturn I launch vehicle with a boilerplate Apollo spacecraft for the first time.
The first-ever cloned horse was born in a natural delivery.
US President Andrew Jackson signed the Indian Removal Act.
