The Subjects of Louis IX the King of France were branded with a hot iron as a sign of loyalty.
When two lovers kiss, nerves send signals to the brain at the speed of 128 kilometers per hour.
A single eagle claw has equal power of four human hands.
Oysters can change their sex from male to female. They can do this countless times.
With the arrival of winter days, human need for sleep increases. In early March, this need begins to decrease.
If a man tried to open the jaws of an alligator, it would be the same as trying to lift the jeep without a jack.
