When a man blows his nose, the air speed that comes out under pressure reaches 160 km per hour.
Earth's rotation reaches a speed of half a kilometer per second.
Grand piano consists of about 12.000 parts.
The Islamic masters were the first to paint paper and often would apply dots of silver or gold on it.
One day on the Moon lasts for 700 hours, or nearly 30 Earth days.
On average, adults laugh fifteen times a day.
