You can hear the blood flowing through your ears if you find a quiet place and cover them tightly.
17
Caffeine boosts memory.
405
The yin-yang pattern's earliest use is in Rome - not China!
125
Stilts were invented by French shepherds who needed a way to get around in wet marshes.
45
No matter its size or thickness, no piece of paper can be folded in half more than 8 times.
-64
It's impossible to kill yourself by holding your breath.
703
The oldest living person smoked cigarettes from the age of 21 to 117.
13
About two hundred babies are born worldwide every minute.
237