There's 100 trillion good bacteria living in your body.
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Your wounds heal faster if you lick them, you instinctively do this for that reason. Tears help, too.
20
Children are more allergic to cockroaches than they are to cats!
46
Brain freeze is caused by the brain sensing the drop of temperature on your palate and increasing blood pressure in an attempt to save you from freezing.
14
The average female will have 3.3 pregnancies in her life.
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The average sperm cell swims at 8 inches per hour.
76
Some people have a "natural alarm clock" allowing them to wake up when they want. This is actually caused by a burst of the stress hormone adrenocorticotropin.
15