A four-year-old child will, on average, ask about 437 questions a day.
Thanks to blinking, an awake man will spend 30 minutes with his eyes closed.
It is impossible to suck your own elbow.
Our kidneys have many tubes; if we would merge them, they would form a long thin tube 65 kilometers long.
Every year thousands of new oak trees grow in the world just because squirrels cannot remember where they hide their acorns.
One day on the Moon lasts for 700 hours, or nearly 30 Earth days.
