The smile is the most frequently used facial expression. A smile can use anywhere from a pair of 5 to 53 facial muscles.

The slowest growing finger nail is on the thumb nail and the fastest growing is the finger nail on the middle finger.

The sensitivity of a woman's middle finger is reduced during menstruation.

The same amount of calories are burned by doing 6 sessions that are 5 minutes each of an activity and doing 1 session of that activity for 30 minutes.

The pectin that is found in apples aids in lowering cholesterol levels.

The most frequent season for most suicides to occur is in the spring. The winter months have the lowest number of suicides.

The majority of American models are skinnier than 98% of American women.

The longest hiccups on record was by an American pig farmer whose hiccups persisted from 1922 to 1987.

The longer white infants from low-income families are breast-fed, the less likely they will be overweight as young children, researchers said on Monday.

The length of a human esophagus is 25 centimeters.

The human liver performs over 500 functions.

The feet have approximately 250,000 sweat glands.

The eight most popular foods to cause food allergies are: milk, eggs, wheat, peanuts, soy, tree nuts, fish, and shellfish.

The early occurrence of a fetus yawning is at eleven weeks after conception.

The average ear grows 0.01 inches in length every year.