Each king in the deck of cards represent a great kind from history: spades - King David, clubs - Alexander the Great, hearts - Charlemagne and diamonds - Julius Caesar.
Sharks will change their sharp triangle teeth (in five rows) continuously throughout their lifetime. They can change up to thirty thousand teeth. It is believed that the bite force of a white shark is equal to three tons.
The Olympic Games in ancient Greece lasted 7 days, including religious ceremonies.
For a spacecraft to overcome the Earth’s gravity, it needs an average speed of 12 kilometers per second.
Dragonfly's eyes can spot its prey from a distance of 40 meters.
The first ski competitions were held in 1893 in Mürzzuschlag in Austria.
