The finalized copy of the United States Declaration of Independence was signed by congress.
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Musical.ly and TikTok merged, combining the users of both apps to form one community.
English clockmaker Daniel Quare gained the patents for a portable barometer to measure air pressure.
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.
Samuel Briggs and his son patented his nail-making machine.
