You can hear the blood flowing through your ears if you find a quiet place and cover them tightly.
17
Contrary to popular belief, hair does not grow back darker and thicker after it has been shaved.
71
It takes 492 seconds for sunlight to reach the Earth!
44
The Main Library at Indiana University sinks over an inch every year because when it was built, engineers failed to take into account the weight of all the books that would occupy the building.
240
Babies are born without knee caps.
78
Sunflowers can be used to clean up radioactive waste.
17
Every year around 1 billion Valentine cards are sent. After Christmas it's a single largest seasonal card-sending occasion.
14