Adolf Hitler became Führer of Germany following the death of President Paul von Hindenburg.
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Researchers in South Korea developed a tattoo that monitors a person's health.
Letter collections started being collected from mailboxes in Boston, US.
The Space Race began between the two Cold War rivals, the USA and the USSR.
Andrew Hallidie introduced the cable car to San Francisco after witnessing a horse and carriage accident.
The King of England, William II, was killed by an arrow while hunting in New Forest Hampshire, England.