Researchers in South Korea developed a tattoo that monitors a person's health.
Musical.ly and TikTok merged, combining the users of both apps to form one community.
Iraq invaded the Gulf state of Kuwait.
A bomb exploded at the railway station in Bologna, Italy.
The Space Race began between the two Cold War rivals, the USA and the USSR.
Adolf Hitler became Führer of Germany following the death of President Paul von Hindenburg.
Andrew Hallidie introduced the cable car to San Francisco after witnessing a horse and carriage accident.
The Tower Subway in London became the first underground tube railway to open.
Letter collections started being collected from mailboxes in Boston, US.
Britain took power over the Indian government.
Samuel Briggs and his son patented his nail-making machine.
The finalized copy of the United States Declaration of Independence was signed by congress.
English clockmaker Daniel Quare gained the patents for a portable barometer to measure air pressure.
English sea explorer Henry Hudson reached the Hudson Bay, which was named after him.
The King of England, William II, was killed by an arrow while hunting in New Forest Hampshire, England.
