In the average lifetime a person will breath in about 44 pounds of dust.
21
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 adult human brain weighs about 3 pounds (1,300-1,400 g).
99
You see your nose at all times, your brain just chooses to ignore it.
30
Dating back to the 1600's, thermometers were filled with Brandy instead of mercury.
16
If your stomach didn't produce a new layer of mucous every two weeks, it would digest itself.
33
After age 30, the brain shrinks a quarter of a percent (0.25%) in mass each year.
139
About 400 different kinds of microbes live on and in the human body.
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