Colorado became the 38th state to join the United States of America.
Source
British scientist Joseph Priestley discovered oxygen by removing it from the air.
Astronauts on Apollo 15 discovered a rock that could date back to the birth of the moon.
Female rowing duo Heather Stanning & Helen Glover claimed Team GB's first Olympic medal at the London Olympics.
While sailing in the Atlantic Ocean, Christopher Columbus discovered Venezuela, which he called 'Isla Santa.'
The Swedish crown jewels were stolen from a cathedral in broad daylight.