The human body contains over a billion miles of DNA.
147
Dating back to the 1600's, thermometers were filled with Brandy instead of mercury.
16
The levels of two stress hormones, cortisol and epinephrine which suppress the body's immune system, will actually drop after a dose of laughter.
112
Like fingerprints, everyone's tongue print is different!
71
The average sperm cell swims at 8 inches per hour.
76
Cracking your knuckles does not actually hurt your bones or cause arthritis. The sound you hear is just gas bubbles bursting.
18
When a person dies, hearing is usually the last sense to go.
124
About 400 different kinds of microbes live on and in the human body.
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