A fetus develops fingerprints at eighteen weeks!
32
Human thigh bones are stronger than concrete!
63
Banging your head against a wall uses 150 calories an hour.
57
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
Human teeth are almost as hard as rocks!
47
Sitting straight upright in your chair is bad for your back. You should instead slouch at an angle of 135 degrees.
10
If your stomach didn't produce a new layer of mucous every two weeks, it would digest itself.
33
More people have a phobia of frogs than rats.
41