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Around the pupil is a colored muscle called the "iris." Our eyes may be BLUE, BROWN, GREEN, GRAY OR BLACK, because that is the color of the iris.
Our eyes have many parts. The black part on the front of our eye is called the "pupil." It is really a little hole that opens into the back part of our eyes.
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In the United States, approximately 25,000 eye injuries occur that result in the person becoming totally blind.
All babies are colour blind when they are born.
A human eyeball weighs an ounce.
If the lens in our eye doesn't work quite right, we can get glasses to help us see. Glasses have lenses in them that work with our eye's own lens to help us see better.
Babies' eyes do not produce tears until the baby is approximately six to eight weeks old.
The reason why your nose gets runny when you are crying is because the tears from the eyes drain into the nose.
The most common injury caused by cosmetics is to the eye by a mascara wand.
Some people start to sneeze if they are exposed to sunlight or have a light shined into their eye.
The highest recorded speed of a sneeze is 165 km per hour.
It is impossible to sneeze with your eyes open.
The space between your eyebrows is called the Glabella.
Inside our eye, at the back, is a part called the "retina." On the retina are cells called "rods" and "cones." These rods and cones help us to see colors and light.
Just behind the pupil is a lens. It is round and flat. It is thicker toward the middle.
Over the front of our eye is a clear covering called the "conjunctiva."
The white part of our eye is called the "sclera." At the front, the sclera becomes clear and is called the "cornea."
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We should never put anything in or near our eyes, unless we have a reason to use eye drops. We would only do that if our doctor or parent told us to use them.
Blinking helps to wash tears over our eyeballs. That keeps them clean and moist. Also, if something is about to hit our eye, we will blink automatically.
Our body has some natural protection for our eyes. Our eyelashes help to keep dirt out of our eyes. Our eyebrows are made to keep sweat from running into our eyes.
Our eyes are very important to us, and we must protect them. We don't want dirt, sand, splinters or even fingers to get in our eyes. We don't want our eyes to get scratched or poked. That could damage our sight!
The study of the iris of the eye is called iridology.
The shark cornea has been used in eye surgery, since its cornea is similar to a human cornea.
The number one cause of blindness in adults in the United States is diabetes.
The eyeball of a human weighs approximately 28 grams.
The eye of a human can distinguish 500 shades of the gray.
The cornea is the only living tissue in the human body that does not contain any blood vessels.
The conjunctiva is a membrane that covers the human eye.
Sailors once thought that wearing a gold earring would improve their eyesight.
Research has indicated that a tie that is on too tight cam increase the risk of glaucoma in men.
People generally read 25% slower from a computer screen compared to paper.
Men are able to read fine print better than women can.
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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.
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Women are twice as likely to be diagnosed with depression than men in the United States.
The human brain has about 100,000,000,000 (100 billion) neurons.
From all the oxygen that a human breathes, twenty percent goes to the brain.
People who ride on roller coasters have a higher chance of having a blood clot in the brain.
Once a human reaches the age of 35, he/she will start losing approximately 7,000 brain cells a day. The cells will never be replaced.
It is not possible to tickle yourself. The cerebellum, a part of the brain, warns the rest of the brain that you are about to tickle yourself. Since your brain knows this, it ignores the resulting sensation.
A women from Berlin Germany has had 3,110 gallstones taken out of her gall bladder.
In America, the most common mental illness is Anxiety Disorders.
Your brain is 80% water.
Your brain is move active and thinks more at night than during the day.
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Two million red blood cells die every second.
There are approximately 100,000 miles of blood vessels in the human body.
Seven percent of a humans body weight is made up of blood.
In the early nineteenth century some advertisements claimed that riding the carousel was good for the circulation of blood.
Each day 400 gallons of recycled blood are pumped through the kidneys.
By donating just one pint of blood, four lives can be saved.
Blood is such a good stain that Native Americans used it for paint.
The kidneys filter over 400 gallons of blood each day.
The average life span of a single red blood cell is 120 days.
Blood accounts for about 8% of a human's body weight.
A woman has approximately 4.5 liters of blood in her body, while men have 5.6 liters.
Your blood takes a very long trip through your body. If you could stretch out all of a human's blood vessels, they would be about 60,000 miles long. That's enough to go around the world twice.
Half your body’s red blood cells are replaced every seven days.
If all the blood vessels in your body were laid end to end, they would reach about 60,000 miles.
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Teenage suicide is the second cause of death in the state of Wisconsin.
Teenage cosmetic surgeries nearly doubled in the USA between 1996 and 1998.
Studies indicate that weightlifters working out in blue gyms can handle heavier weights.
Studies indicate that listening to music is good for digestion.
Studies indicate that epileptic patients that listen to Mozart's Piano Sonata can dramatically decrease their chance of a seizure.
Lack of sleep can affect your immune system and reduce your ability to fight infections.
It takes about three hours for food to be broken down in the human stomach.
Over 40 million Americans have chronic bad breath.
Carbon monoxide can kill a person in less than 15 minutes.
Fourteen people die each day from asthma in the United States.
Every day the human stomach produces about 2 liters of hydrochloric acid.
Nearly half of all Americans suffer from symptoms of burnout.In humans, the epidermal layer of skin, which consists of many layers of skin regenerates every 27 days.
Native Americans used to use pumpkin seeds for medicine.
In ancient Egypt, doctors used jolts from the electric catfish to reduce the pain of arthritis.
The lining of the a person's stomach is replaced every 36 hours.
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People that use mobile phones are 2.5 time more likely to develop cancer in areas of the brain that are adjacent to the ear they use to talk on the mobile phone.
Over 90% of diseases are caused or complicated by stress.
Over 436,000 U.S. Troops were exposed to depleted uranium during the first Gulf war.
On average, 90% of the people that have the disease Lupus are female.
Many cancer patients that are treated with chemotherapy lose their hair. For some when the hair grows back, it can grow back a different colour, or be curly or straight.
Diabetes is the fourth leading cause of death in the U.S., accounting for about 180,000 deaths per year.
Chances of a women getting breast cancer are increased by excessive use of alcohol.
A popular superstition is that if you put a piece of bread in a baby's crib, it will keep away diseases.
A person that is struck by lightning has a greater chance of developing motor neurons disease.
Every year in the U.S., there are 178,000 new cases of lung cancer.
Every three minutes a woman is diagnosed with breast cancer.
Asthma affects one in fifteen children under the age of eighteen.
Every eleven minutes in the U.S., a woman dies of breast cancer.
Due to eating habits in the USA, one in three children born in the year 2000 have a chance of getting type II diabetes.
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The smallest bone in the human body is the stapes bone which is located in the ear.
There are 54 bones in your hands including the wrists.
The only bone fully grown at birth is located in the ear.
The human face is made up of 14 bones.
The chances of getting a cavity is higher if candy is eaten slowly throughout the day compared to eating it all at once and then brushing your teeth.
If an identical twin grows up without having a certain tooth, the other twin will most likely also grow up with that tooth missing.
Humans are born with 300 bones in their body, however when a person reaches adulthood they only have 206 bones. This occurs because many of them join together to make a single bone.
Gardening is said to be one of the best exercises for maintaining healthy bones.
Enamel is hardest substance in the human body.
Although the outsides of a bone are hard, they are generally light and soft inside. They are about 75% water.
Adult human bones account for 14% of the body's total weight.
In 2000 babies are born with a tooth that is already visible.
Fingernails grow nearly 4 times faster than toenails!
Your thigh bone is stronger than concrete.
The strongest bone in your body is the femur (thighbone), and it's hollow!
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The universe is so vast in relation to the matter it contains that it can be compared in the following way: A building 20 miles long, 20 miles wide and 20 miles high that contains 1 grain of sand.
The three most common elements in the universe are 1) hydrogen; 2) helium; 3) oxygen.
As late as 1820, the universe was thought to be 6,000 years old. It is now thought to be between 15 and 20 billion years old.
Scientists believe that hydrogen comprises approximately 90 to 99 percent of all matter in the Universe.
A bucket filled with earth would Weigh about five times more than the same bucket filled with the substance of the sun. However, the force of Gravity is so much greater on the sun that a man Weighing 150 pounds on our planet would Weigh 2 tons on the sun.
A space vehicle must move at a rate of 7 miles per second to escape the earth's Gravitational pull. This is equivalent to going from New York to Philadelphia in about twenty seconds.
There are approximately 10,000 pieces of equipment revolving around the earth. About 3,000 of these pieces are satellites, the rest are odd bits of Debris.
Astronomers believe that the universe contains one atom for every 88 gallons of space.
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Uranus' axis is at 97 degrees. which means that it orbits on its side. (Most of the planets spin on an axis nearly perpendicular to the plane of the ecliptic but Uranus' axis is almost parallel to the ecliptic.)
The three most recently discovered planets were Uranus in 1781, Neptune in 1846, and Pluto in 1930.
Mercury is the only planet whose orbit is coplanar with its equator. Venus and Uranus are the only planets that rotate opposite to the direction of their orbit.
Jupiter has the shortest day of all the planets. Although it has a circumference of 280,000 miles compared with Earth's 25,000 Jupiter manages to make one turn in 9 hours and 55 minutes.
If you are having problems remembering the planets in their correct order, just remember this sentence "My very educated mother justed served us nine pickles," Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, Pluto.
According to scientists, Gold exists on Mars, Mercury, and Venus.
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Baby robins eat 14 feet of earthworms every day.
At one time the earth consisted of one land mass and a huge body of water. Geologists today call the land Pangaea (from the Greek words "all land" while the water was called Panthalassa (from the Greek words "all sea"). Between 180 and 200 million years ago, Pangaea split into two parts: Laurasia, which consisted of North America, Europe and Asia; and Gondwanaland, which consisted of Africa, South America, India, Antarctica and Australia.
Astronauts brought back about 800 pounds of lunar rock to Earth. Most of it has not been analyzed.
Approximately 40,000 tons of meteoric dust hits the Earth each year.
According to Hawaiian lore, the earth mother Papa mated with the sky father Wake to give birth to the Hawaiian Islands.
About one-tenth of the earth's surface is permanently covered with ice.
A Red Giant(a kind of exploded star) has a lower density than any vacuum here on earth.
A Blue Earth, Minnesota, law declares that no child under the age of twelve may talk over the telephone unless monitored by a parent.
You would need to travel at 6.95 miles per second to escape the Earth’s gravitational pull. This is equivalent to traveling from New York to Philadelphia in about twenty seconds.
Venus rotates so slowly that in a typical day lasts approximately 244 Earth days (5,856 hours).
If you dig in your backyard, don’t worry about running into the earth’s core. You’d have to dig a hole 4,000 miles (6,437 kilometers) deep!
Some scientists believe that the earth began billions of years ago as a huge ball of swirling dust and gases.
Some parts of the earth receive direct rays from the sun all year and are always warm. Other places receive indirect rays, so the climate is colder.
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There are more stars than all of the grains of sand on earth.
You can see stars from the bottom of a well even in day light.
Stars with really strong gravity cause themselves to become smaller and smaller and eventually turn into black holes.
Stars come in different colors; hot stars give off blue light, and the cooler stars give off red light.
In honor of the original thirteen states, the U.S. $1 bill has the following on the back: 13 steps on the pyramid. The motto above the pyramid has 13 letters (annuity coatis). E pluribus Unum, written on the ribbon in the eagle's beak, has 13 letters. 13 stars appear over the eagle's head. 13 stripes are on the shield. 13 war arrows are in the eagle's left talon.
All of the stars comprising the Milky Way galaxy revolve around the center of the galaxy once every 200 million years or so.
Until the mid sixteenth century, Comets were believed to be not astronomical phenomena, but burning vapors that had arisen from distant swamps and were propelled across the sky by fire and light.
Our galaxy has approximately 250 billion stars and it is estimated by astronomers that there are 100 billion other galaxies in the universe.
A galaxy of typical size, about 100 billion suns produces less energy than a single Quasar.
A Comet's tail always points away from the sun.
A Pulsar is a small star made up of neutrons so densely packed together that if one the size of a silver dollar landed on earth, it would weigh approximately 100 million tons.
The Star Alpha Herculis is twenty five times larger than the circumference described by the earth's revolution around the sun. This means that twenty five diameters of our solar orbit would have to be placed end to end to equal the diameter of this Star.
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Our sun has an expected lifetime of about 11 billion years.
Our sun and the surrounding planets orbit around the center of the Milky Way galaxy once every 250 million years.
Only 55% of all Americans know that the sun is a star.
On its trip around the sun, the earth travels over a million and a half miles per day.
No solar eclipse can last longer than 7 minutes 58 seconds because of the speed at which the sun moves.
Lightning bolts can sometimes be hotter than the sun. (about 50 000º F)
It takes only 8 minutes for sunlight to travel from the sun to the earth, which also means, if you see the sun go out, it actually went out 8 minutes ago.
In Spit Bergen, Norway at one time of the year the sun shines continuously for three and a half months.
In Newport, Rhode Island it is illegal to smoke from a pipe after sunset.
In Devon, Connecticut, it is unlawful to walk backwards after sunset.
If the sun stopped shining suddenly, it would take eight minutes for people on earth to be aware of the fact.
For 186 days you can not see the sun in the North Pole.
Every eleven years the magnetic poles of the sun switch. This cycle is called"Solarmax".
Because of the speed at which the sun moves, it is impossible for a solar eclipse to last more than 7 minutes and 58 seconds.
Aztecs believed that the sun died every night and needed human blood to give it strength to rise the next day. So they sacrificed 15,000 men a year to appease their sun god, Huitzilopochtli. Most of the victims were prisoners taken in wars, which were sometimes started solely to round up sacrificial victims.
At the distance at which our sun is located from the center of the Milky Way galaxy, Earth and the rest of our solar system are moving at a speed of about 170 miles per second around the center.
At its center, the sun has a density of over a hundred times that of water, and a temperature of 10-20 million degrees Celsius.
All the coal, oil, gas, and wood on Earth would only keep the Sun burning for a few days.
An area of the Sun's surface the size of a postage stamp shines with the power of 1,500,000 candles.
Your fingernails can turn yellow from wearing nail polish and from the sun.
If the entire solar system were the size of a quarter, the sun would be visible only under a microscope, and the nearest star would be 300 feet away.
The Sun provides our planet with 126,000,000,000,000 horsepower of energy every day.
If the earth were the size of a quarter, the sun would be as large as a 9 foot ball and would be located a football field distance from the earth.
More than 1 million earths would fit inside the sun.
99% of our solar systems mass is concentrated in the sun.
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The lunula is the half-moon shaped pale area at the bottom of finger nails.
The term "honeymoon" is derived from the Babylonians who declared mead, a honey-flavored wine, the official wedding drink, stipulating that the bride's parents be required to keep the groom supplied with the drink for the month following the wedding.
The Sea of tranquility is found on the moon.
The saying 'once in a blue moon ' refers to the occurrence of two full moons during one calendar month. The last two occurred in January & March 1999. The next one isn't until the end of 2001.
The moon actually has mirrors on it. They were left there by astronauts who wanted to bounce laser beams off them, so that the distance to the moon can be measured.
The Earths core is a ball of Iron-Nickel at 7,000 C and is 80% the size of the moon.
Moon was Buzz Aldines mother’s maiden name. (Buzz Aldine was the second man on the moon).
Just twenty seconds worth of fuel remained when Apollo 11's lunar module landed on the moon.
Jupiter's moon Ganymede is the largest moon in the Solar System, and is larger than the planets Mercury and Pluto.
It takes about 1.25 seconds for moonlight to reach the Earth.
If you pile up the cans of Yeo's products, you would be able to reach the moon.
If you fold a piece of A4 paper in half 44 times it will reach the moon
All the moons of the Solar System are named after Greek and Roman mythology, except the moons of Uranus, which are named after Shakespearean characters.
A full moon is nine times brighter than a half moon.
A manned rocket can reach the moon in less time than it used to take to travel the length of England by stagecoach.
A "Blue Moon" is the second full moon in a calendar month (it is rarely blue).
27% of Americans believe we never landed on the moon.
The lunula is the half-moon shaped pale area at the bottom of finger nails.
When the moon is directly over your head, you weigh slightly less.