Oysters can change their sex from male to female. They can do this countless times.
Mammoths became extinct 1,000 years after Egyptians completed the construction of the pyramids.
The first ice cream was made in the 18th century in the Sicilian town of Taormina with the help of snow from the slopes of Mount Etna, the only live volcano in Europe.
The last US state to introduce mandatory photo on the driver's license was New York, 1984.
The Mongolian khan and the Chinese emperor went hunting with 500 falcons and an entourage of 10.000 people.
Leonardo da Vinci made the first draft for the contact lenses. They should have been made of thin glass filled with water...
