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By deftly swinging, stretching, and doubling a fist-size lump of
flour-and-water dough, a Chinese master noodle maker can create 2,048
strands of "long xu mian" - dragon's beard noodles - each as fine as a
human hair. (This Chinese delicacy is deep fried and wrapped into thin

Tooth enamel is the hardest substance manufactured by the human body.

In the second it takes to turn the page of a book, you will lose
about 3 million red blood cells. During that same second, your bone
marrow will have produced the same number of new ones.

Turkana tribesmen, who live on the barren soils of the Great Rift
Valley in Kenya, add iron to their diet by drinking cow's blood - they
puncture the cow's jugular vein with a sharp arrow and catch the spurting
liquid in a clay jug. The cows, though bled frequently, suffer no ill

The epidermis, the outermost layer of the skin, sheds itself at a
rate of about a million cells every 40 minutes.

The average square inch of skin holds 650 sweat glands, 20 blood
vessels, 60,000 melanocytes (pigment cells), and more than a thousand
nerve endings.

The rush of air produced by a cough moves at a speed approaching 600
miles per hour.

The brain reaches its maximum weight at age 20 - about 3 pounds.
Over the next 60 years, as billions of nerve cells die within the brain,
it loses about 3 ounces. The brain begins to lose cells at a rate of
50,000 per day by the age of 30.

Between ages 30 and 70, a nose may lengthen and widen by as much as
half an inch and the ears may be a quarter-inch longer - due to the fact
that cartilage is one of the few tissues that continue to grow as we age.

The pituitary gland - responsible for producing the hormone that
regulates growth - is only the size of a pea and weighs little more than a
small paper clip.

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