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.
Swallows will fly all day in search of insects and sometimes they will fly more than 800 kilometers.
In one day the heart beats around 100.800 times. It pumps through the blood vessels as much blood as it would take to fill about 170 average bathtubs.
Ancient Greeks often carried their coins in their mouths, because the clothes did not have pockets.
The Mongolian khan and the Chinese emperor went hunting with 500 falcons and an entourage of 10.000 people.
Expansion of a crocodile jaw causes secretion of the lacrimal (tear) gland, and that is how the belief was created that the crocodile was mourning his victim.
