The power of the first lasers was measured by the number of razor blades the laser beams could pass through.
The Islamic masters were the first to paint paper and often would apply dots of silver or gold on it.
Thanks to blinking, an awake man will spend 30 minutes with his eyes closed.
Flies are flying at the speed of 6 km per hour.
Every 24 hours 364.321 babies are born and 147.137 people die. That means that Earth’s population grows with the pace of 79 million each Year.
Dragonfly's eyes can spot its prey from a distance of 40 meters.
