Musical.ly and TikTok merged, combining the users of both apps to form one community.
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The King of England, William II, was killed by an arrow while hunting in New Forest Hampshire, England.
Researchers in South Korea developed a tattoo that monitors a person's health.
The finalized copy of the United States Declaration of Independence was signed by congress.
Letter collections started being collected from mailboxes in Boston, US.
Andrew Hallidie introduced the cable car to San Francisco after witnessing a horse and carriage accident.