The harder you concentrate on falling asleep, the less likely you are to fall asleep.
34
The 1 yen coin can be used as a weight, because it weighs exactly one gram. Also, it can float on water.
19
The sound you hear when you crack your knuckles is actually the sound of nitrogen gas bubbles bursting.
244
In many countries, urine was used as a detergent for washing.
17
Couples' personalities converge over time to make partners more and more similar.
235
There was once an undersea post office in the Bahamas.
241