American pop singer Ariana Grande joined YouTube at 13 years old.
Source
America's Rocket Lab Electron sent a rocket that uses an electric-filled pump engine into orbit, making it the first of its kind.
King of France, Louis XVI, faced gruesome guillotine execution for high treason.
The Flag of Quebec was adopted and flown for the first time over the National Assembly of Quebec.
A meteorite that hit Australia 2.2 billion years ago was announced as Earth's oldest recognized meteorite impact structure.
The first Star Trek convention was held in New York City.
