When withdrawing money from an ATM, the 'whirring' sound before your money pops out is actually a recording. The actual mechanism is so far back that you can't hear it.
282
Fine-grained volcanic ash can be found as an ingredient in some toothpastes.
55
Coins usually survive in circulation for about 30 years.
66
Stilts were invented by French shepherds who needed a way to get around in wet marshes.
45
The average American uses eight times as much fuel energy as an average person anywhere else in the world.
28
The sound you hear when you crack your knuckles is actually the sound of nitrogen gas bubbles bursting.
244
In an average hour, there are over 61,000 Americans airborne over the United States.
24
By raising your legs slowly and laying on your back, you can't sink in quicksand.
105