The center of the Earth is located approximately 6.440 kilometers from the surface.
During the day a man’s nail grows on average 0.1 millimeters, and for a new one to grow fully it needs approximately three months.
The first personal computer was made in January 1975 in the company MITS in New Mexico. It cost about 395 US dollars, and customers had to assemble it by themselves. It was called the Altair 8800.
Leonardo da Vinci made the first draft for the contact lenses. They should have been made of thin glass filled with water...
Dragonfly's eyes can spot its prey from a distance of 40 meters.
It takes no more than 20 moves to solve the Rubik’s Cube.
