Selena Gomez achieved a world record for being the first person to reach 100 million followers on Instagram.
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NASA launched the Mars Observer, a space probe designed to study Mars' geology and climate.
Paul Galvin and his brother Joseph founded Motorola as the 'Galvin Manufacturing Co.' in Chicago, Illinois.
The Battle of Stamford Bridge occurred between the English army and a Norwegian force.
Henry Ford changed employees' working schedules to 8-hour days, 5 days a week.
China finished building the world's largest radio telescope at 1,640 feet (500 meters) long.
