Banging your head against a wall uses 150 calories an hour.
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Cracking your knuckles does not actually hurt your bones or cause arthritis. The sound you hear is just gas bubbles bursting.
18
While 7 men in 100 have some form of color blindness, only 1 woman in 1,000 suffers from it.
50
The focusing muscles of the eyes move around 100,000 times a day. To give your leg muscles the same workout, you would need to walk 80km (50 miles) every day.
21
About half of all Americans are on a diet on any given day.
29
The average person can live for eleven days without water, assuming an average temperature of 60 degrees fahrenheit.
15
There's a new vaccine for alcoholism that gives drinkers an immediate and harsh hangover, even if they drink a small amount of booze.
14
Most lipstick contains fish scales.
37