According to one report, it would take 800 marijuana joints to kill a person - but the cause of death would be carbon monoxide poisoning.
176
You inhale about 700,000 of your own skin flakes each day.
29
If you unfolded your brain, it would cover an ironing board.
42
Men have larger hearts; women's hearts beat faster.
77
It takes about 20 seconds for a red blood cell to circle the whole body.
102
Panophobia is the fear of everything.
52
About 400 different kinds of microbes live on and in the human body.
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