When you look up at the blue sky and see white dots flying around, you’re actually seeing your own white blood cells.
30
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
Every time you lick a stamp, you're consuming 1/10 of a calorie!
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Fingernails grow nearly 4 times faster than toenails!
30
The average person's skin weighs twice as much as their brain.
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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
20 minutes after smoking a cigarette, blood pressure drops to normal.
37
The human brain doesn't stop developing until about 25 years old.
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