For a spacecraft to overcome the Earth’s gravity, it needs an average speed of 12 kilometers per second.
Isaac Newton was kicked out of school. He was expelled as a teenager at the request of his mother, who wanted him to become a farmer.
The Subjects of Louis IX the King of France were branded with a hot iron as a sign of loyalty.
Lions are the only cats that do not purr.
A single eagle claw has equal power of four human hands.
Of all the animals, lynx has the sharpest hearing. In the deepest of sleep, they can hear the slightest sound coming from afar. This beast hears so well thanks to its “tufts” on the top of its ears that serves as a kind of antenna.
