Human facts

Human thighbones are stronger than concrete!
One quarter of the bones in your body, are in your feet!

Human teeth are almost as hard as rocks!

The average person has over 1,460 dreams a year!

Your heart beats over 100,000 times a day!

A sneeze travels out your mouth at over 100 M.P.H.!

The average American/Canadian will eat about 11.9 pounds of cereal per year!

One in every 4 Americans has appeared on television!

It's against the law to burp, or sneeze in a certain church in Omaha, Nebraska!

Ancient Egyptians slept on pillows made of stone!

In space, astronauts cannot cry, because there is no gravity, so the tears can't flow!

About 3000 years ago, most Egyptians died by the time they were 30!

Your ribs move about 5 million times a year, every time you breathe!

Smelling bananas and/or green apples (smelling, not eating) can help you lose weight.

A hard working adult sweats up to 4 gallons per day. Most of the sweat evaporates before a person realizes it's there, though!

The average person laughs 13 times a day!

Every time you lick a stamp, you're consuming 1/10 of a calorie!

A man named Charles Osborne had the hiccups for 69 years! Wow!

Americans eat about 35,000 cookies in a lifetime!

Like fingerprints, everyone's tongue print is different!

Chewing gum while peeling onions will keep you from crying!

More people use blue toothbrushes, than red ones!

Fingernails grow nearly 4 times faster than toenails!

The pulse rate for adult males is about 70-72 per minute and 78-82 per minute for adult females. The rate can increase to as much as 200 per minute during violent exercise!

Every human body is naturally radioactive. It is so, since the body contains a little amount of the radioactive isotope Potassium-40 and Carbon-14, which is absorbed by living organisms from atmosphere!

Nerve impulses-to and from the brain, travel as fast as some racing cars. The fastest impulses recorded have travelled at nearly 290 km/hr!

The focusing muscles of the eye move about 100,000 times a day. To give the leg muscle the same exercise would involve at least 80 km (50 miles) walking a day!

The retina inside the eye covers about 650 square millimeters and contains some 137 million light sensitive cells besides 130 million rod cells for black and white vision, and 7 million cone cells for colour vision!

If you go blind in one eye you only lose about one fifth of your vision but all your sense of depth!

You can see a candle flame from 50 Kilometers on a clear, dark night!

You can hear the tick of a watch from 6 meters in very quiet conditions!

You can taste one gram of salt in 500 liters of water (.0001M)!

You can detect one drop of perfume diffused throughout a three-room apartment!

You can detect the wing of a bee falling on your cheek from a height of one centimeter!

Only about 10 percent of the air in the lungs is actually changed with each cycle of inhaling and exhaling when an at-rest person is breathing, but up to 80 percent can be exchanged during deep breathing or strenuous exercise!

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 effect!

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!

The sound of a snore (up to 69 decibels) can be almost as loud as a pneumatic drill (70-90 decibels)!

Women's hair is about half the diameter of men's hair!

If an average man never shaved in his lifetime then his beard would grow 27.5 feet!

Human brain consumes around one-fifth of the food we consume!

A human brain is composed of 80% water!

The tallest-ever human (a man) measured is 272 cm in height!

 The shortest-ever human (a woman) measured 61 cm in height!

Tongue is the strongest muscle in the human body!

 You're born with 300 bones, but when you get to be an adult, you only have 206!