Dartboards are made out of horsehairs.
129
When glass breaks, the cracks move faster than 3,000 miles per hour.
47
Real diamonds do not show up on x-ray.
36
The 1 yen coin can be used as a weight, because it weighs exactly one gram. Also, it can float on water.
19
If you're one in a million, there are about 7,234 people just like you.
31
Those things you see in your eyes when you stare into space are called Mouches Voltanes, which are also broadly referenced to as Floaters.
9
"Strategic incompetence" is the art of avoiding certain tasks by pretending you don't know how to do them.
16
Since 1982, a radio frequency emanating from Russia has been broadcasting a buzzer-like sound and, periodically, an unknown voice reads orders, names, and numbers. No one knows where exactly it is coming from or what it means.
13