The sound you hear when you crack your knuckles is actually the sound of nitrogen gas bubbles bursting.
244
Tae Kwon Do is only around 60 years old.
64
In the White House, there are 13,092 knives, forks and spoons!
51
If you get water flowing fast enough, it can cut metal.
354
There are 170,000,000,000,000,000,000,000,000 ways to play the ten opening moves in a game of chess.
266
Real diamonds do not show up on x-ray.
36