20. Death erections exist.

Careful. You can die if you get a hard enough erection.

19. Every person has a unique tongue print.

...just like fingerprints.

18. Sleepyheads die first.

The popular "8 hours sleep per night" recommendation is wrong. Study shows higher death rates over 6 or 7 hours of sleep.

17. The stomach produces a new lining every 3 days to avoid digesting itself with its own acids.

Self-explanatory. Strong acid is constantly breaking down not only the food, but your own stomach.

16. We can eat upside down.

The "pipe' that goes from your mouth to your stomach is divided into sectors. Each sector is a muscle which squeezes the food to the next sector. Traveling to your stomach.

15. Humans are the crybabies of nature.

Just like animals make squeeky noises when they're emoitionally down, we make tears when we're emotionally down.

14. White skin has evolved over time.

It seems we were all black ones (consistent with evolutionary fact of first humans in Africa). White skin was a result of humans moving away from the equator.

There's tons of PROOF today that skin color is NOT permanent. Typical is Micheal Jackon who was once black. His skin lot pigment, and turned white.

13. Humans pee - a lot.

It seem we pee about 16 tons of pee every year. Enough to make a wonderful family swimming pool in your back yard.

12. An 8-hour sleep saves us just energy to eat a piece of toast.

Weird. I wonder why we feel more energetic then sleeping after a hard day of work.

11. The foot is home to the body's thickest area of skin.

It's also got the most sweat glands then in any other area.

10. We don't need no stinkin' colored contacts.

Ever wonder why some people have two different-colored eyes? This extremely rare condition, known as heterochromia iridium, is caused by an increase or decrease of pigmentation in the iris.

9. It takes a special kind of sweat to create BO. That, and not bathing.

All sweat is not created equal. The type of sweat that stinks is found it areas with hair, including: Scalp, armpits, genitals

8. We can go a loooong time without sleep.

The world record for staying up is held by Randy Gardner, who went 264 hours and 12 minutes (that's 11 days) without sleep in 1964; he was 17 at the time. Gardner did not use any stimulants to keep him awake, and was considered to be in good health when he completed his task, though he did experience some hallucinations, short term memory loss, and grogginess.

7. Our cells are suicidal.

Bottom line: For organs to form during embryonic development, some cells must commit suicide. Without such programmed cell death, we would all be born with webbed feet, like ducks.

6. The appendix isn't as useless as you think.

It's found that it acts as a good safe house for bacteria.

5. It is possible to have black and white twins.

. The soul does not weigh 21 grams.

It makes for a nice poetic story, and one very depressing Sean Penn movie, but the theory that the soul weighs 21 grams hasn't exactly been proven.

The whole thing started in 1907, when Massachusetts doctor Duncan MacDougall conducted a series of experiments with six dying patients, in which he noted that their bodies weighed 21 grams less upon death - hence marking the departure of a 21-gram soul. MacDougall also measured dogs and noted no difference in pre- and post-mortem weight, thereby concluding that dogs do not have a soul.

The problem, as Great Moments in Science notes, is that MacDougall's six patients are too small of a sample to offer significant proof, and the experiments were plagued by technical difficulties and inconsistencies. In fact, only one of MacDougall's patients actually had a 21-gram drop in weight.

3. It is possible to die laughing.

Just ask the dearly departed Alex Mitchell, who spent his final moments laughing uncontrollably at an episode of the 1970s UK TV show "The Goodies," reports Snopes.com. As his wife watched in horror (or glee?), Mitchell laughed for 25 straight minutes before he "slumped on the settee" and died of heart failure.

2. We resist weight loss.

Proof once again that we are own worst enemies, researchers at the Queensland University of Technology in New Zealand last year discovered that our bodies are "programmed" to protect themselves against weight loss.

1. The body is taller in the morning than in the evening.

A rat can last longer without water than a camel.

Your stomach has to produce a new layer of mucus every two weeks or it will digest itself.

The dot over the letter "i" is called a tittle.

A raisin dropped in a glass of fresh champagne will bounce up and
down continuously from the bottom of the glass to the top.

A female ferret will die if it goes into heat and cannot find a mate.

Chewing gum while peeling onions will keep you from crying.

A 2 X 4 is really 1-1/2" by 3-1/2".

During the chariot scene in "Ben Hur," a small red car can be seen
in the distance (and Heston's wearing a watch).

On average, 12 newborns will be given to the wrong parents daily!
(That explains a few mysteries....)

Sherlock Holmes NEVER said, "Elementary, my dear Watson."

Because metal was scarce, the Oscars given out during World War II were made of wood.

The number of possible ways of playing the first four moves per
side in a game of chess is 318,979,564,000.

There are no words in the dictionary that rhyme with orange,
purple and silver.

Astronauts are not allowed to eat beans before they go into space
because passing wind in a spacesuit damages them.

The very first bomb dropped by the Allies on Berlin in World War II killed the only elephant in the Berlin Zoo.

Weatherman Willard Scott was the first Ronald McDonald.

If one places a tiny amount of liquor on a scorpion, it will
instantly go mad and sting itself to death. (Who was the sadist who
discovered this??)

Bruce Lee was so fast that they actually had to s-l-o-w film down
so you could see his moves. That's the opposite of the norm.

The first CD pressed in the US was Bruce Springsteen's "Born in
the USA."

The original name for butterfly was flutterby.

The phrase "rule of thumb" is derived from an old English law which
stated that you couldn't beat your wife with anything wider than your thumb.

The first product Motorola started to develop was a record player
for automobiles. At that time, the most known player on the market was Victrola, so they called themselves Motorola.

Roses may be red, but violets are indeed violet.

By raising your legs slowly and lying on your back, you cannot
sink into quicksand.

Celery has negative calories. It takes more calories to eat a
piece of celery than the celery has in it to begin with.

Charlie Chaplin once won third prize in a Charlie Chaplin
look-alike contest.

An old law in Bellingham, Washington, made it illegal for a woman
to take more than three steps backwards while dancing!

The Guinness Book of Records holds the record for being the book
most often stolen from public libraries.

The glue on Israeli postage is certified kosher.

Bats always turn left when exiting a cave!

Thanks to Deborah for submitting this!!

And  another via email --this comes by Suzie T....

In the 1400's a law was set forth that a man was not allowed to beat his wife with a stick no thicker than his thumb. Hence we have "the rule of thumb"

The first couple to be shown in bed together on prime time TV were Fred and Wilma Flintstone.

Men can read smaller print then women can; women can hear better.

It is impossible to lick your elbow.

The State with the highest percentage of people who walk to work: Alaska

The average number of people airborne over the US any given hour: 61,000

Intelligent people have more zinc and copper in their hair.

The first novel ever written on a typewriter: Tom Sawyer.

The San Francisco Cable cars are the only mobile National Monuments.

111,111,111 x 111,111,111 = 12,345,678,987,654,321

Each king in a deck of playing cards represents a great king from history:

Spades - King David
Hearts - Charlemagne
Clubs -Alexander, the Great
Diamonds - Julius Caesar

If a statue in the park of a person on a horse has both front legs in the air, the person died in battle. If the horse has one front leg in the air the person died as a result of wounds received in battle. If the horse has all four legs on the ground, the person died of natural causes.

Q. Half of all Americans live within 50 miles of what?

A. Their birthplace.

Q. If you were to spell out numbers, how far would you have to go until you would find the letter "A"?

A. One thousand

Q. What do bulletproof vests, fire escapes, windshield wipers, and laser printers all have in common?
A. All invented by women.

Q. What is the only food that doesn't spoil?
A. Honey

In Shakespeare's time, mattresses were secured on bed frames by ropes. When you pulled on the ropes the mattress tightened, making the bed firmer to sleep on. Hence the phrase......... "goodnight, sleep tight."

It was the accepted practice in Babylon 4,000 years ago that for a month after the wedding, the bride's father would supply his son-in-law with all the mead he could drink. Mead is a honey beer and because their calendar was lunar based, this period was called the honey month, which we know today as the "honeymoon".

In English pubs, ale is ordered by pints and quarts... So in old England, when customers got unruly, the bartender would yell at them, "Mind your pints and quarts, and settle down."

It's where we get the phrase "mind your P's and Q's"

Many years ago in England, pub frequenters had a whistle baked into the rim, or handle, of their ceramic cups. When they needed a refill, they used the whistle to get some service. "Wet your whistle" is the phrase inspired by this practice.